Features? Whidbey? Oh My!!

Well, as I'm sure most of you are already aware, the Whidbey beta has been out for a while now, and hopefully some of you have gotten a chance to play with it.  Assuming you have, what features are you seeing that you absolutely love?  What features do you now find 'missing' when looking at the Managed DirectX libraries?

In short, now would be the perfect time to suggest features on things you might like to see in a "Whidbey" specific version of Managed DirectX.

( And yes, I'm aware of the loader lock problem using the current MDX assemblies with Whidbey.. So ignore that one.. :D )

Edit: Comments seem to be broken.. I'm trying to fix it.. Let me know if it works..