Built on Windows Presentation Foudation (WPF), this is one of the best looking, most functional IM clients I’ve seen. I’ve been using Windows Live Messenger and MSN messenger before the name change, for years now. Given that Live Messenger now supports Yahoo contacts, if this new Yahoo messenger for Vista supported Live contacts, then I’d consider changing.
Deatils @ http://messenger.yahoo.com/windowsvista.php
More WPF applications @ http://channel9.msdn.com/wiki/default.aspx/WPF.ApplicationPortfolio
