Long ago, I allowed Gmail to access my AIM account, somehow granting everlasting permission for Google to login to my AIM account, so it seems. I've found a few notes around the web about how to break the connection, but they are all out-dated. I even changed the AIM password, but when I login again with say Adium, the connection is re-established. I'll need to test, but I don't believe it is a client thing as much as Google simply having been granted permission to connect. That is I'd be on the first login to google, it would re-establish the association.
How do I permanently dis-associate, disconnect Gmail and AIM?
As of Thursday, June 23, 2011 I am still looking for a solution to this. I'm shocked that somehow Google is logging into my AIM account despite me changing the AIM account password multiple times now! NONE of the tips on the internet provide a solution because Google has apparently removed any reference to AIM connection management.
I'm willing to sacrifice all of my reputation points and maybe a bonus of a few dollars to anyone that can provide a solution because it is causing a distracting number of messages to come into my chat client. Adium is double-listing new messages and opening new windows for double-listed buddies. That is, I have Adium configured to connect to both AIM and Google because of my diverse buddy lists. I would have continued to only connect Adium to Google, but Google doesn't always relay messages properly. Sometimes, it doesn't properly list when my buddies are online. Or it does show them online, and when I send a message they don't get it. So, connecting to Adium to AIM works, but I also have to maintain connection to Google... hence double-listings and double-messages.