so that people who've bought your music before can hear about your new music

Encouraging people to buy an artist entire album makes for a more robust Popcuts economy and might help increase support from labels.

I think you should put your newsletter content into blog posts so that people can reference the newsletter on other social networking sites.

There's great songs, but there's also songs that sound like crap. Some of us experiment and download a new artist, and the song ends up being horrible. There should be a way to vote down songs.

I want to upload multiple songs from different albums. I'd like to be able to group them accordingly.

people who manage labels want to get credit, not just artist and song

May I make a new purchase without using my credit?

In the "choose the amount you want to pay", add an option to pay exact amount you purchased in case customers want to keep their credit in their accounts.