To me, it makes perfect sense for Google to offer a wiki engine for anyone wanting a Web Office suite — I think a good wiki (put to good use) is potentially a bigger game-changer for a corporation than just about anything else, especially online spreadsheets or email, or even instant messaging. And I think JotSpot is pretty good, although I’m a big fan of both Socialtext and Wetpaint.com. Ross Mayfield of Socialtext has posted his reaction here.
Now all Google is missing is a presentation engine. You ready to get the call up to the big leagues, Thumbstacks? Or maybe Google wants something that is more along the Web conference line — in which case, I would recommend Vyew.com. Steve Newson has a pretty good roundup of the other contenders here.