VLC for S60 would be full of win!
Althought it wouldn't be just simply a "feature request" but rather whole a new release.
I've been working on streaming TV-image over internet, and while it works on PC I've been unable to find any mobile applications for S60 able to receive avi streams. Coreplayer is the only exception, but it takes like 2-3 minutes to start the video even when packed with a very low bitrate.
Everything is there - mobile broadband, smartphones, digital TV - only the software is missing.