my friend m-ndro got laid thru his diaryland (not exactly a blog, but still). apparently this girl left a msg in his guestbook and they started talking back and forth & both lived in the same city and things progressed. also, recently i read a blog (i think found thru metafilter) of some guy who was getting married through a woman he'd met through the blog. apparently she read it, emailed him, they started writing back and forth, and again, things progressed.