Jeff Morris just released some details about the first patch for UT3. Here's the changelog (admin/network relevant only):
Networking:- Implemented STUN support (Simple Traversal of UDP Through Network Address Translators) to enable clients and servers to connect from behind a NAT.
- Fixed team scores very rarely not updating for a client.
- Fixed bot faction option when running a listen server.
- Fixed link setup not reset correctly when going from a map with a custom link setup to one using the default.
- Fixed a case where Duel would place an incoming player on the wrong team when some players were still travelling.
- Bullseye stats are now properly recorded.
- Fixed clients not travelling to downloaded maps correctly.
- Fixed the client and server getting into a loop sending each other close messages in some situations.
- Quick match incorporates player rating into search decision.
- Fixed issue where Vista clients would not receive all servers from a server browser search.
- Applied proper fix to suppressing voice on dedicated servers.
- Fixed issues with players not getting on right team in Duel and Duel+Survival if a player leaves in certain timing windows during map transitions.
- Fixed previous level PRIs showing up on the scoreboard/leaderboard after the client travels (making it look like players have already scored lots of points when those clients are in fact still loading)
- Fixed losing your custom character mesh after changing teams during a match.
Server Administration:- Reduced tick rate for dedicated servers with no clients (saves CPU on idle servers).
- Dedicated servers do not require CD keys.
- Added -configsubdir= command line option to cause .ini files to be loaded/saved from the specified subdirectory of Game\Config\
- Added QueryPort configuration and command line option.
- Added an "AdminChangeOption [option] [value]" console command for server admins. This allows changing most simple .ini values (e.g. GoalScore) from the client. This command will not override URL options. The change will take effect after the next map change.
- Added an "AdminPublishMapList" console command for server admins. This overrides the server's map list for the current game type with the one on the client that used the command.
- Uses GameReplicationInfo.ServerName if set for the name of the server on the
server browser.
- Added "AdminForceVoiceMute" and "AdminForceVoiceUnMute": Stops/Starts a player from sending voip to others
- Added "AdminForceTextMut" and "AdminForceTextUnMute": Stops/Starts a player from send text messages to others
- Updated AdminPlayerList to show the PlayerID of the players on the server.
- Updated Kick/Ban to allow for using either the player name or the id
For the rest of the change list see the first reply.