Surfin' Safari has a recent blog posting about the latest Web Inspector redesign. As much as I like FireBug, this thing really leapfrogs it in functionality. I've pretty much stopped using Firefox as my primary browser. Even 3.0.x is slow, bloated and unstable. The only thing keeping me from killing Firefox entirely was the lack of good FireBug functionality. Those days are over, congrats to the Safari/Webkit teams, thank you so much for your hard work.