The 2nd and more exciting feature is a brand new search utility called the "QSB" (aka Quick Search Box) which lets you quickly execute a search at any time (whether you're in your browser or not) and it also provides access to the applications on your machine without having to mess with the Start menu or scouring through icons on your desktop. You can bring up the box either by clicking on the Google logo on your task bar or by pressing Cntrl+ spacebar.
If you use a mac, you can grab this as a standalone app from here.
For the small handful of you reading this who are still using IE :) give this new toolbar a try and send me your feedback!
Firefox users can get the new tab page feature via this version, but there won't be a QSB to play with sadly.
Lastly, G00g is now officially on Twitter if you're into that sort of thing.