As if they weren’t busy enough releasing the Chrome Web Store, the Chrome OS test drive, and inadvertently letting the first Google +1 image leak, Google had one more trick up their sleeve today: the new Google Groups.Technically, Google is just previewing the new Google Groups user interface. “The new Google Groups user interface represents the first in a series of updates to Google Groups,” Google writes here. And it really is a complete revamping. The new style is much more in the Gmail/Google Reader mold. And in fact, some elements even seem a little Wave-like.