Oh, I took your original question more generically. You can use last.fm to provide you with recommendations in general according to what you listen to (after scrobbling your library for a while), but acquiring the recommendations (and/or integrating into your active playlist) is a whole other thing. I’m sure it’s possible but I don’t know of out of the box way. Might be a plugin or something out there for it somewhere. That’s why the convenience of streaming can be pretty nice.