If you are anything like me, you feel overwhelmed by rapid advances that are being made just by Microsoft lately. If you were not lucky enough to get to TechEd or the more recent PDC then you will need to get your hands on the content being presented at these events.
Beyond the old favourites of DNRTV and Channel9 these sites maybe of interest too:

/web. Microsoft’s new homepage for all things web
PDC. The home page for the PDC event that just happened.

I have yet to find a web resource of the TechEd content. I was however able to get the content from a friend who did attend (~60GB!). Well worth it if you can get hold of them.