> People on MSN could chat with people on GChat, but people on GChat couldn't chat with people on MSN.
How this had worked?
I mean, in XMPP both parties need a JID, so MSN users must have had theirs.
Had MSN had generated random non-discoverable JIDs for their users, blocked any incoming messages unless there were prior outgoing communications, made GChat interop opt-in or what?