Thanks for the comments about what I should write about next. Hopefully I managed to count these more accurately than the Iowa Republican party :-)
Of course my blog is not a democracy, so I'm not promising to actually cover these topics in that order! But it is useful to know that for instance I have more readers interested in C++ than in SIMD optimization.
There were also several write-in nominations:

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  Specifics of how XNA is implemented. It does seem like there should be a couple of interesting articles to be had here. I will have to think about exactly what they might be.
  
• 
  Managed <-> native interop (esp. WinRT). Hmm. My immediate reaction is I don't know enough about this topic, but I will mull it over and see if anything worthwhile comes to mind.
  
• 
  A couple of requests to talk about future XNA plans. Sorry, no can do. Not my team any more!
  
• 
  Single-vote requests to write about input, component based entities, and XACT garbage. Unlikely (due to lack of knowledge / opinions / info to share) but I will bear them in mind.
  
  Thank you all!
  
  Source