for WinRT and .NET discussions, maybe this episode of Hanselminutes is a good one

Scott's confused about what 'WinRT' is. Is it a new .NET? A new runtime? Is .NET dead? He's totally confused so he talks to Immo Landwerth who sets him straight with complete context from Win32 to COM to .NET and beyond.

for .NET vs. C++ discussions, you may want to watch this Java vs. C++ (vs Javascript) talk by Cameron Purdy