Last week iPhone Dev Team released untethered jailbreak for iOS 4.3.1 using the exploit found by @i0n1c. iOS 4.3.1 Untethered Jailbreak, which was rolled out in the form of Redsn0w and PwnageTool, is compatible with all idevices except iPad 2.
Apple is about to launch iPad 2 within next 15 minutes. It is not confirmed whether Apple will provide a live streaming of this event or not. However, here is the official link for all Apple Media Events and if Apple streams this event too, you can watch there provided you are on Mac OS X.
Kevin Rose, the founder of popular link sharing site Digg has posted on his blog that Apple is going to announce the much awaited iPad 2 within next 3-4 weeks.
The fact is you can not play/listen internet radio in background on your iPad because the current iOS version for iPad does not support multitasking, but here is a simple trick which works for certain radio stations.