Google has announced plans to get Google Talk and AIM talking, but with a little elbow grease you can do that and more today.

First, download and install the free Jabber client called Psi. It's a fine Jabber client, and you might want to keep it, but you won't need to once you've set everything up. The Psi wiki has a great step-by-step for connecting to Google Talk. Follow their instructions and you'll be able to see your Google Talk contacts.