The new version includes Widgets by default this time around. Another nice feature in this release is a Blogger importer that'll yank everything off of Google's servers automatically for you. There are also a slew of new developer features.

"Most interesting about this release is that is our first under the new, experimental development cycle that we first talked about when we released version 2.1 fewer than 4 months ago. We delayed a few weeks from our target date in April, but ended up under our original goal of a 4 month major release cycle."