We love single-subject photoblogs. Yesterday, we posted about Travis' ExpressTrain and the other MTA blogs, and today we'd like to point out Dead Programmer's 100 Views of the Empire State Building. You guessed it: it features only pictures of the ESB. Currently, he's up to about 30. Besides photoblogs dedicated to graffiti and streetart, we can't think of too many more of these narrowcast subjects. Any suggestions?