Hu Shunjie, a colleague and friend, has created an AIR based Instant messaging application, named airTalkr. Besides the native IM service, users can also connect their existing Yahoo!, MSN, AOL, ICQ accounts, thanks to JiveSoft's OpenFire server he uses in the backend. airTalkr also has a video module, which lets users view videos from YouTube, and a photo module, which lets users browse photographs from Flickr.
Its his personal AIR project based on Flex2. AFAIK, he developed the entire application, in a remarkable time period of around two months thanks to his amazing speed at churning out code. And thats besides his day job in our client team for velvetpuffin, (and not to mention, his newly married wife at home!). airTalkr is also a demonstration of Flex's (and AIR's ) rapid application development capabilities.
He is currently calling out for alpha testers for his application. Check out his post!