Jamendo.com

Jamendo is the world's #1 platform for free and legal music downloads. So don't expect to find any of your Top 40 songs here. Available in seven languages, it offers the largest catalog of music under Creative Commons licenses. For artists, it's an easy and efficient way to publish, share and promote their music, and also to make money, through ad revenue sharing and commercial partnerships. If your into new music or unsigned bands then you should have a field day here. Or if you just don't like paying for music you can get some pretty good tracks legally free.

6/10

thesixtyone.com

A Pandora style website where music is streamed randomly based on what the listeners like. It's interface is nothing short of painful, in comparison though. It took a few minutes to work it out but basically you have to sign up to use it properly. It's great for finding new music but not if your looking for something specific.
thesixtyone is a nurturing and growing ecosystem where talented folks can sell songs and merchandise directly to their fans. Unlike a record or distribution deal where they only make $1-2 per album (if they ever get paid, that is), artists on thesixtyone make at least $7 per album and are paid every 30 days -- no wait for recoupment and no complex royalty schemes!
There named after Highway 61, a U.S. route that runs along the Mississippi River and marks the origin of American music culture. Muddy Waters, Bob Dylan and B.B. King rode the 61. Elvis grew up in the housing projects along it. Highway 61 was the road by which people left their homes to take their music to the world.

6/10

mp3drug.com

This is one of my favourite mp3 search engines at the moment. It has a great layout and easy to use interface. Simply search for your file and browse the results for your required mp3. The option to play the file from the site before downloading is a major bonus with this site as well as the playlist option for registered users. You can also sign in with your Facebook account allowing you to share your music easier.
Extra features such as related artist and album art at the side of the search give it that more professional feel. An overall great mp3 search engine, apart from the annoying 'Join us on Facebook' pop-up.

8/10

Free-mp3.ca

Another MP3 search engine. It doesn't look that up to date but does offer a lot of MP3's to download, and seems to be used regularly. The major drawback is that you can only download via a toolbar, which is only available on IE so unless you use it I wouldn't say it's worth your time.
I can't seem to find much more about this site and I'm concerned about where the files are hosted. I think it may just want you to download the toolbar.
If you have any experience with this site please leave a comment below.

4/10

kvaz.com

This is an mp3 search with a twist. You may of seen the Zippy Share Hint I posted recently, well this site offers an mp3 search of Rapidshare. It also has an option to search everything or just verified files. Your search may be limited but I know there are a lot of mp3 files on Rapidshare.

7/10

mp3juices.com

Another mp3 search based website. Very simple and easy to use. Just search from the home screen and select your song for download. It seems to have a lot of files but not as update as I'd like. For your average music downloads you should be fine.

6/10

Pandora.com

With Pandora you can explore this vast trove of music to your heart's content. Just drop the name of one of your favorite songs or artists into Pandora and let the Genome Project go. It will quickly scan its entire world of analyzed music, almost a century of popular recordings - new and old, well known and completely obscure - to find songs with interesting musical similarities to your choice. Then sit back and enjoy as it creates a listening experience full of current and soon-to-be favorite songs for you. 

It's a shame it's not available for people outside the US anymore, well unless you know how to use a proxy. Still one of my favourite music sites where I have spent hours playing through it.

10/10

Last.fm

Last.fm is a music recommendation service. You use Last.fm by signing up and downloading The Scrobbler, which helps you discover more music based on the songs you play. The Scrobbler also works with the site Hypem.com that was mention in a previous post so if you use one or the other you should think about combining the two find a lot of songs you may not of known about.

8/10

Smacki.com

Some of you may know about the Google Search hacks which allow you to access the files of unsecure sites. Well Smacki.com has automated this for you. It is a simple site which allows you to search for any mp3 file through Google.
By simply typing in the artist name or song, or both, it adds the complicated part of the equation for you and searches Google for your file.
It may take some time to browse the sites for your file but when you find what you want, it's a simple right-click and save job!

7/10

Hypem.com

To put it simply, the Hype Machine keeps track of what music bloggers write about. They handpick a set of kickass music blogs and then present what they discuss for easy analysis, consumption and discovery. This way, your odds of stumbling into awesome music or awesome blogs are high.

I use this site daily as it offers the newest music everyday. As a DJ I find loads of future hits via this site. It also offers the option to download and buy the songs through 3 or more major online stores with ease.

9/10

We7.com

we7 is an outstanding new music destination where you can listen to, share and discover music for FREE, legally and safely. You choose the music you want to hear and play full songs and albums online, on-demand at anytime. They also offer you the ability to buy the music you love in high quality mp3 downloads which you can play on iPods and most other digital players.

It is, in my opinion, the best music streaming service out there at present, I suggest you take a look if you want for music 100% legally.

10/10

BeeMP3.com

BeeMP3 is a music search engine for locating mp3-audio files over the Internet.
They don't host any files on the site, they use a crawler to search through the internet and index all the brand new and popular songs for your browsing pleasure.
At time of writing they have 800,000 mp3 files in there search database and approximately 10,000 files are added daily.

8/10