As of today (to coincide with WinHEC), the all-you-can-eat buffet of bits is open for business. Make sure you grab an extra large plate, because you're definitely going to need it. Don't forget to leave room for dessert!
As always, these are beta products, so you should not run them on production systems.
One last thing...now that IIS7 is available, you should check out the IIS site.