The Google IO conference keynote for day 1 covers a lot of interesting HTML5 topics.
The whole thing is a series of 10 minute YouTube videos, starting at #2 (the first is just a very long intro with random animations).
http://www.youtube.com/watch?v=02WB4dRGGH4&feature=PlayList&p=41F4CEB92D80C4B7&index=1
Once you get to the stuff on Google App Engine and Google Web Toolkit, that part is all a bit
meh - skip to 02:30 of #9 for some Android sneak-peek stuff.
There's also a day 2 keynote covering
Google Wave, which may or not be Google's attempt at re-inventing email or twitter or something else ... I'm off to see if there's a video explaining what it actually is.
EDITED: 30 May 2009 15:48 by BOUGHTONP