Lots of them do, actually. A friend of a friend has created a blog about blogs – specifically, those about game development. Well worth a visit if you enjoy that kind of thing. And if you like that kind of thing, definitely check out Irrational Games. They’re the game studio behind, most recently, the BioShock series. Their podcasts are excellent, well-produced, and definitely worth a listen.
Oh, one of the blogs on the GameDevBlogs site is by a mate of mine, talented bloke by the name of Daniel Lim. Don’t tell him I told you that though.