Check out also What's new in Premiere Pro CS5 and CS5 Production Premium, which adds Flash Catalyst and updates for the other apps! PC Magazine has a review of CS5.
You can also sign up to attend the CS5 Production Premium Road Show that's hitting 7 North American cities in May and early June so far.
Here's an intro to CS5 Production Premium by Karl Soule from Adobe TV's CS5 Production Premium Feature Tour:
Update: At PVC, Scott Simmons kicks the tires on Adobe Premiere Pro CS5: Better, Faster, Bigger and Especially Faster.
Update 2: Adobe's Stephen Muratore has new posts linking Premiere Help, intro videos, and related matters on his blog Adobe Premiere Pro Training.