Re: f/connect help needed
f/connect isn't really applicable to a zencart store since out of the box you cannot checkout as a guest. f/connect works on the premise of authenticating a user against your websites own auth/acl. Since zencart requires specific information to create an account, and not all facebook users have that information in their profiles to begin with, your really beating a dead horse.
The best approach you can take here is throw 15 - 20 hours of work at it and strip registration from zencart, us f/connect to authenticate, then modify the checkout process to register an account while they fill out there shipping/payment information. You could auto populate some fields, not many using the f/connect API.
Hope this helps, no small task.
Dan - statuscontrols.com/web
web programming and design