Startup Idea : Native Yammer Client for the Mac

Yammer is the premier closed social network for companies Essentially they're a paid Facebook for enterprises. Currently Yammer have client applications for a number of platforms. However their desktop offerings are rather lacking, resorting to an Adobe Air based cross-platform lowest-common denominator application that delivers not much better user experience than a web browser. It would be great if there is a native Cocoa-based OS X client for Yammer that delivers a user experience and level of functionality equivalent to Twitter's official OS X client.