I took an invite link from the page source and came up with the following.
// SuperTycoons, honda_racer98, 26/nov/2009
I thought this was the right format, but I'm not having luck. Any ideas? When I go to the recruit page, it lets me try to build a friends list (says 0 out of 750), but then after a few cycles, I get a "The Page you requested could not be found" as part of the subframe.
The "The Page you requested could not be found" comes up because it's trying to go back to the recruits page but because it's using some strange facebook ajax feature, it doesn't have a url to go back to so it gets lost. But it only does that after the list of friends have been refreshed so it's ok.
Looks like there's a h=..... hash there, it maybe that the has is auto generated. Is it different for every different player id that comes up?