Should still be possible, I don't know the address for it though.
None.
http://code.google.com/p/bwapi/wiki/changes116I don't know what you're looking for, but here you go. It's been changed, but only slightly. I'm sure you can find the location in there.
66fe28 is the location of the host's name, though. Add 34 decimal to that to get the next player who joined. This is in the lobby.
You can read any memory in any patch.
"Parliamentary inquiry, Mr. Chairman - do we have to call the Gentleman a gentleman if he's not one?"