There are, of course, more than two blogs that deserve praise, but these are two that I just can't get enough of. They are:
ἐν ἐφέσῳ - I feel smarter just reading Mike's blog. If I had a tenth of a percent of Mike's knowledge of Greek, I think I'd be doing just fine. I'm trying to read through his posts to get a better feel on the whole "aspect/tense" issue with Greek. If you don't already read this blog, get over there!
Pisteuomen - For one, the guy has a cool name - T. Michael W. Halcomb. Most Biblical scholars have only got a puny two initials to shorten (D.A., F.F., etc) - not this guy. He's got a whole slew of names to chose from. Secondly, his website is decked out. Third - he creates some really cool software modules for Greek, German, Hebrew, and Aramaic. And Fourth - he has blogged about the Gospel of Mark more than anyone, I think.