Apple just released (within the past half hour) iTunes 8.1 and it seems to be "zippier".
They also have a new system for App Store reviews, where you can filter reviews by a particular version.
The primary enhancements for iTunes 8.1 relate to the new iPod Shuffle, introduced today, but there are quite a few other new features. Here's the Readme:
What's new in iTunes 8.1