Last we heard from PR flack Steve Rubel, he was on his knees apologizing for publicly trashing PC Magazine. Now Edelman PR's spokesblogger wants the world to know he's sorry for inflating the Web 2.0 bubble. He writes, "Since I started this blog lots of people have rightfully made fun of how much I touted every little new site to come along. Their criticism is accurate." Don't worry, Steve. It's not your fault. You'd only be guilty if you'd actually succeeded at imitating Michael Arrington.