Got mine, works great when directly linked to my cable modem. Puts out two signals, a secure password only wifi sig and a unsecure public wifi sig. From what I understand you have to sign up with Fon to use the public signal, but I live in the country where no one is in range of the public signal anyway. Great find lets me connect my Wii and PC to the private signal at the same time (haven't tested max connections). I didn't have to sign on anything past what I did to order the equipment either.
Judging from an earlier post, it appears that I'll never be charged for the wifi router, but when someone signs up for the public sig they have to pay a few bucks a day to use it so thats how FON makes a return.
Also it appears that even though the free 10,000 are gone, current members of FON can invite friends to the FON network and FON will send them a free Wifi router. Not quite sure where they expect to make a profit out of this though... =P