Driving your firefox like vim

Recently a friend of mine pointed out pentadactyl to me. It's a firefox add-on to drive your browser in a vim-like style. I had tried vimperator in the past and didn't like it very much back then, but a lot has improved since then.

Obviously there's a learning curve involved, like in many great tools, but I think for me it was worth it. I have it now enabled in all my firefoxes/iceweasels.