Most of the action is on the Yahoo! toyota-prius site, and you have to register to post there. I found that registration on that Yahoo! site was very tedious; I had lots of trouble getting a password approved, even though I used every conceivable variation of my name forward-backward-upside down, etc. Finally got accepted and started lurking and occasionally participating, only to have my ISP start blocking Yahoo! because it appeared on some spammer listing. More trouble to get it unblocked. Finally got it working again, for now. Almost more trouble than it was worth. I really wish that priusonline.com was the main Prius site because it is intelligently organized and very easy to access. As usual, quantity doesn't mean quality, and vice versa.