Andrew Lovatt: I think the Airfoil page does a pretty good job explaining to what you can send audio:

"Send any audio to AirPort Express units, Apple TVs, iPhones and iPods Touch, and even other Macs and PCs, all in sync"

I'm not sure how we might make that more clear?

Tony C: The AirTunes protocol, used by both Airfoil and iTunes, delays audio. There's no getting around this - Airfoil isn't recommended for use in situations where you need instant audio.

http://rogueamoeba.com/support/knowledgebase/?showArticle=AirfoilVideoPlayer

Pierre: You can purchase a license key for Airfoil for Windows right through our store, http://www.rogueamoeba.com/store/

Stephanovitj: Nothing should have changed there, from our end - that's always appeared to be a Cambridge-issue. But if it's currently working better for you, great.

MH12345: Controlling Pandora isn't really something for the Airfoil side of things. Perhaps for Airfoil Speakers - we'll see. You might look for iPhone-based remote controls in general, or VNC clients.