lexipixel - 5:42 pm on Nov 26, 2010 (gmt 0)
Google is running a "Watch This Space" AdWords promo. The campaign features a flash ad, (I found it running on Mashable). The AdWords "Watch This Space" flash ad expands a 728x90 into a larger horizontal rectangle, then gives you some ideas for interactive content you can run in the space.
Goog put up a page about it, but its just sizzle with no steak: