With a multitasking Jailbroken iPad, instant messaging doesn't seem so silly...
BeeJive has been a popular premium app for the iPhone, and they've done it again with the iPad version of Beejive.
BeeJive IM supports multiple IM services, including AIM, Google Chat, Facebook chat and many others. Setup is quick and easy, just hit the honeycomb icon and begin adding accounts.
BeeJive will be $6 when it hits the App Store (for a limited time) and will cost $10 later.
Check out Gadget Lab's Preview of Beehive