Yannick - I agree!
I have been using GTDInbox (firefox extension) with Gmail for a few weeks now and wow, what a difference. I had been using the netcentrics add-in for outlook but have been migrating to google mail for a few months. I was about to give up on gmail until I found GTDInbox. I highly recommend this extension to any GTD'er trying to use gmail.
Anyone else have any comments on GTDInbox?