Just an FYI, it looks like AOL has finally taken their first and second shots at Trillian. Yesterday, any user with SecureIM enabled for AIM couldn't sign on. Today, even with it disabled (or running the new 0.72 version) Trillian users still can't connect. Both problems happened at about midnight CST, so it looks like an update on the AIM servers is causing it.
I'll update this post if any workarounds get posted. Keep in mind 0.72 now can check for updates, so it's a worthwile upgrade. The main Trillian web page is really slow today, so here are a few sites to grab 0.72 from:
Site 1
Site 2
Site 3
Site 4