My favorite by far is Zite. I also use and enjoy USA Today. Netflix also makes it on my home page, and might I add 'New on Netflix' to that list to keep you updated on new Netflix releases ?
For audio apps, I use SoundHound and TuneIn Radio. Both are quite popular and receive well earned scores from users.
Intel i5 2500K@4.3, Gigabyte Z68XP-UD3-iSSD, Powercolor PCS+ 290x 4GB, 2TB Hitachi HDD, Thermaltake Level 10 GT Snow Ed, Corsair H80, Win 7 Pro