So, Soundcloud isn't bad but a number of people have noticed that the tracks don't play back too well, furthermore its ugly as fuck with a limit on the number of tracks one can upload.
AVFN is now on Bandcamp which so far seems to be both the best looking music site and the easiest for both artists and fans to interact with. Unfortunately its not currently possible to upload any tracks longer than around thirty minutes but, on the other hand, there doesn't seem to be any limit to the number of albums or tracks one can upload. AVFN is most likely to use Bandcamp over and above Soundcloud or Last in future so keep checking back. Here are some HNW bandcamp sites:
A View From Nihil
Anarcho Freaks Production
Die Reitenden Leichen