Grr... rowr. Annoyed...
Strangley enough, I can install SoU, connect to Gamespy... no problem, even tried connecting to a few random servers, no problem.
Then I rev up Kyle's launcher, no problem... enter username/password... Ok. Connect to Server, no problem... then:
Connection to Server Failed
Connection Failure: Your CD Key is Unauthorized
Try again over at Mythos... zorch, same thing.