GTalkr
GTalkr, a web based flash powered IM client that communicates with Google Talk was launched yesterday. What's cool is that it can interface with other flash based services, the new beta Yahoo Maps (reviewed earlier) being one of them and also allow developers to create new extensions.
Whether AJAX is the new Flash, or AJAX competes with Flash, they're both increasingly turning up in cool apps. TechCrunch also discusses GTalkr.