I've been going through the MSDN chat page today and I found another that may be of interest to C++ developers. There's a 64-Bit Driver Development Chat on Thursday, August 26th at 10:00 AM (PST).
Ask the Experts Online: 64-bit Driver Development
Experts from Microsoft's Core Windows team will be available to answer questions related to the coding and debugging of 64-bit drivers, including both x64 and IA-64 platforms. This is an opportunity to get guidance on the differences between 32-bit and 64-bit driver development.
You can add this to your Outlook Calendar here.
Update: Since this has passed I took it off the C++ feed so it will no longer show up in the Visual C++ Developer Center.