There were still some technical issues with the C&C3: Tiberium Wars 1.01 patch so EA has now released patch 1.02.
A couple of days ago they released patch 1.1 which featured a bunch of updates.
Here's the changelog of C&C3: Tiberium Wars patch 1.02:
Fixed an error that caused the list of available matches in the Custom Match Lobby to constantly refresh to the top of the list.
Improved the patching process to ensure all players are prompted to receive the latest version of the game when attempting to play online or using the "Check for Updates" feature in the Command & Conquer 3 Tiberium Wars Control Center utility.
EA says they are working on yet another patch. The upcoming patch 1.03 will address several multiplayer issues.
The patch can be downloaded at EA's site, and there are probably also mirrors on some of your favorite games sites. Or you can grab it through the game's automatic update feature.