A couple of my friends on Facebook said they tried to instant message me, yet I never got their messages. Running a test currently. Instead of using the "all-in-one" Trillian IM client, I currently have the official AIM, Windows Live Messenger, Yahoo, and Skype clients running (with Facebook chat in Skype). If I get their messages now, I'll know something is buggy with Trillian (wouldn't be the FIRST time!).
Also have the Paltalk client running, but since it's not in Trillian, it's always running anyway!