I have received the following message from somebody who signed up via the Free Gadget Zone and has now completed their offer, and received their free item :-
from Vanessa
to The Free Gadget Zone
date Mon, Sep 1, 2008 at 11:32 AM
subject i got my free [...]

Well, after i signed up back in March via a site called Free iPhone to a couple of sites powered by freepay, i have now received 2 amazon vouchers for completing both sites.
I got £150 from one site, and £240 from another.

Had an email from one of the guys who signed up via FreeGadgetZone to tell me he had received his TomTom One Europe v3, and for just 6 referrals.
Hope your free ps3 comes as easy as your tomtom did.