What do you want to know about Windows 7?

Update: We have posted the answers to some questions

We're going to be sitting down shortly with Mike Nash, Vice President of Windows Product Management, who heads up Windows 7 development. Now that the news and screenshots are out there, what else do you want to know about Windows 7?

Wondering about UAC, HomeGroup, Device Stage or Play-to? How about the new Dock-like Taskbar or System Tray? Leave your questions as comments below and we will try to get them answered for you!