In fact, there are some changes since yesterday.
1. Before today, IE will halt by Custom Gadget.
2. Each site need to login again independly.
I think the last post "How to use Custom Gadget for Friend Connect" can be expired now.
Thank the Google Friend Connect Teams working hard, and We know there are some bug report that even the offical gadgets failed in IE today, I think it must be side effect while GFC debugging.
Anyway, you can take 3 gadgets freely now, see "Custom Gadgets for Google Friend Connect", if there are any bug, please free to tell me in wall gadget or gtalk session.