It seems that Google has hired Sean Egan, GAIM developer, to work on Google Talk.
This makes a lot of sense as GAIM and Google Talk are IM software. In addition, it is also important to make Google Talk compatible on the open platform (looking at the direction Google is heading).
Working at Google
I (Sean) have been hired by Google, moved to Seattle, and have been working on the Google Talk team for about a month and a half. The goal of Google Talk is to make real-time communication as open as possible, and in that regard, I've been working to offer all of Google Talk's features into other clients. Currently, I'm working on making it as easy as possible for other clients to use Google Talk's voice features. You can expect Gaim and other clients to be interoperable with Google Talk's voice features in the near future.