Jason, can you kind of describe the comparisons/contrasts between this and Spotify? Want to make sure I'm using the best option and Spotify is kinda iffy for me lately.
I wrote about it somewhere once - but I don't remember the exact place it is ... so here's a quicker rundown:
1) Spotify has more people on it - so if you're going to share a song with someone, odds are they're on Spotify and can hear it/listen to it. They've got a slightly larger catalog from what I've seen (but maybe once out of ever hundred times I look for an album I find it on Spotify and not Rdio, so it's not that big a deal). Spotify has ads unless you pay for it. You can, however, play your own library in it - which is really nice.
2) Rdio's got the better interface (IMO it's not close). I love their apps. Love their recommendation engine. Love being able to embed players - and share the music with friends. It's free without ads for a certain time per month - but I pay for it cause I love the mobile apps and listen to it almost exclusively now (besides advances). You can't listen to your own catalog/library on it - which is the one downfall if you're looking for something that's not released yet.
My personal preference is Rdio based mostly on the experience and ease of use. A lot of time has gone into making sure the experience is great -- and I really respect that.