The reason I do not like Google Reader much is because of the reason that it does not come as a standalone desktop app. However this is about to change with the new Adobe Air app called ReadAir.
ReadAir is an OSX Themed Desktop Client for any operating system that can run the Adobe AIR platform (Mac, Windows or even Linux). It synchronizes with your online Google Reader account to provide you the latest news and articles through RSS feeds.
This app is open-source and hosted on Google Code. The developer has promised that the app will soon feature some unique themes and keyboard shortcuts. The great feature of this app is that it retains the qualities of other apps built on the Adobe Air platform i.e. light size and simplicity.

Something tells me that FeedDemon by NewsGator (currently the most-used desktop RSS reader app) is going to get a tough competition with ReadAIR.
Linux/Ubuntu users can read our guide on How to Install Adobe AIR on Ubuntu to enjoy using this app on Linux
Pingback: Apprise: Air RSS Reader with Twitter Integration