I just cancelled my Rdio subscription because of missing artists. There's one really really easy way for you to fix this issue though. Let me manage music that's not in your catalogue so I don't have to pull out iTunes, and so I can mix and match those songs into Rdio playlists.

Oops! I totally meant that Spotify doesn't have those bands. Rdio definitely does.

You guys have a fantastic product. It's easy to stick with it.

I'm pretty sure that dstone meant to write that Spotify was missing those bands (e.g. Arcade Fire et al), not Rdio. I've been listening to a good bit of Arcade Fire on Rdio lately, and just confirmed that they aren't available on Spotify.