Is there any reason why you dislike MP3.COM? I've heard the complaint that they're too "commercial" now, but their services are truely beneficial to the artists, regardless of how much money they make.
Free hosting, free streaming, free DAM CD creation, and they PAY you for playtime.
Just stay off the stupid message boards over there and ignore the people who want to do download exchanges.
I hated IUMA. In fact they censored me right off their service! I couldn't believe it! (they didn't censor me for content, but rather for a lack thereof...really obsurd)
Slackmaster 2000