It was pretty easy to jailbreak. Quite a few of the JB apps don't work with 3.0, though. I have MxTube, Flashlight, and a couple others installed that work. Cycorder does not work, however. I'm trying right this moment to get some more sources into Icy, the Cydia substitute until Cydia is updated for 3.0.
^i'd have to agree with the old guy on this one. seems like a lot of jailbroken apps haven't been ported over yet. hopefully the beta release (and jailbreaks) will expedite the process when 3.0 is officially released this summer.