supernova – this is an indie artist community that can gives emerging artists a chance to show off their stuff with their battle of the bands and hysteria competitions. As one of their sponsors I give studio time to winners (12 hours for first, 4 hours for second place) of the local competitions here in the greater Vancouver area.
reverbnation – this is a great way to promote your band and it provides several ways – including streaming your music and selling on iTunes – to help you do that.
bandcamp – this site, like CD Baby, is a great way to sell your songs online for download. Unlike iTunes, you can set your own price and even the format of the download. It’s easy to setup and use.
socan – at some point hopefully you need this organization! In Canada they are the way you collect royalties for your music.