
2. Last.fm
Pros: Plentiful community features and perhaps the best-tailored music recommendations; let's you add individual tracks to playlists for calling up later; lets you tag tracks and purchase directly from iTunes; no ads that we noticed.
Cons: Interface isn't as straightforward as those of Pandora and Slacker; not as valuable to users who aren't involved in the Last.fm community; a bit slower than other music apps listed here; skip limits.
The gist: With all its features, tabs, and buttons, the Last.fm application is one of the most in-depth and dynamic streaming music applications available for the iPhone.