As Major Nelson mentioned in his blog post, XNA had an open house on Monday night at the Xbox campus. Here's a video of the launch event including Major Nelson interviewing Dave Weller.  

Unfortunately I only had my camera phone, so the pictures aren't great, but here's an XNA game running on the Xbox

 

Here's a blurry picture of Channel9's Rory Blyth doing a video interview

 

Big props to Dave for getting the event organized on such short notice. As you may have seen, the XNA announcement was on the front page of Slashdot.

 

Here's an amusing comment on the XNA acronym from the Slashdot post:

From the FAQ:
Q: What does XNA stand for?
A: XNA's Not Acronymed


Seems even the Evil Empire has a sense of humour.

For those who don't know, you can thank (or blame) Dave, not J Allard, for that :)