Fire up iTunes and upgrade your iPhone to iOS 4. You’ll need the new iTunes 9.2 I posted about a few days ago. You’ll now be able to multitask and apps like Pandora are already updated to take advantage of that. I have been seeing reports on Twitter though that the iPod Touches aren’t getting the same new features. Seems to have left out locking screen orientation and multitasking. I haven’t tested on my iPod Touch yet though so let me know in the comments if you’re missing features.