If you're looking to test out your remix skills, Songsmith can help you get involved in the "Mixable '09" contest. Here's a description of the contest, from their Web page:
"MIXABLE is a yearly UK contest that gives school kids a chance to remix, rework and replay a previously released song from a new and exciting band. Whoever comes up with the best version as chosen by the band will get to work further on the track in a full studio, and this new version will then be featured on an upcoming release with full production and performing credits!"
This year's contest will be using the song "Girl You Never Knew", by Georgia Wonder. To help you get started, the band has provided not only their vocal and instrumental tracks, but also a Songsmith file containing their vocal tracks, all set up and ready for your creativity:
http://mixable.co.uk/download
Of course there are lots of other ways to work on this song, and Songsmith might just be one step along the way to a great remix.
Have fun!
-Dan