Right now URLs are created for new content, but they don't include the author's name in the path. So, for A Foggy Day it came out http://www.tuneburg.com/content/foggy-day. It's searchable, but not ideal. From the standpoint of letting folks brand themselves, it should have wound up as ~/content/frank/foggy-day or something like that. Pretty minor point in the big scheme of things.
The Audio module seems to be working alright, but each user currently only gets to upload a single tune. Pretty serious limitation if you ask me. I think I need to get the playlist module and fool around with it to get more of a typical look and feel.