I recently discovered that my colleague Nazeeh ElDirghami has his own blog. And not just any blog, but one full of actual posts about actual XNA stuff!
Weird how you can work with someone for ages, yet totally fail to notice what their virtual alter-ego is up to on the Internet.
Nazeeh is responsible for testing the framework, by the way. That means if you find any bugs in it, he is the man to blame (as opposed to my code, which is of course always perfect, so any problems must clearly be the fault of the tester who discovers them :-)