At Remixin, we've been working on making the site more useful to artists. We are developing enhancements to the site and the remix contests. These will be coming over the summer. In the mean time check out the new user profiles. We've made member submitted music more prominent and cleaned up the layout.
Some good examples are http://www.remixin.com/mantris , http://www.remixin.com/djfingers and http://www.remixin.com/kirby
We're always open to feedback, let us know how we can more useful to all the musicians out there!