Not sure how you define a blog. I've got a website, a Flickr and a Tumblr.
The website is updated sporadically - but is something I'd really like to improve and make into my main reference point on the interweb. The Tumblr site is quite new and has opened up a lot of new search and view options for all manner of interesting stuff.
My Flickr account........well, I just don't have sufficient time to devote to being active on it any more. In any event, most of the groups I belong to are, at best, interesting but sllooooww. At worst, they're either moribund or frequented by people who just want to have fights between themselves over the most pointless and meaningless issues. I think my bit will go the way of the Dodo....