Recent additions to my GCS include the APM binary stream and the UavDevBoard (Matrix Pilot/Serial UDB Extra) data stream plus playback of UDB text file on the Data File tab. Quad model is also a new addition (many more models coming soon). Screen is now resizable and depending upon the instruments size, either the glass cockpit or 3D model can be clicked and selected as the "big" instrument. Minimum screen size is now 800X400 which should work well on older laptops and netbooks.
Next on the To-Do list is APM 2-way with MAVlink support, Installer and more models. Still hoping to add AttoPilot support shortly.
If you're having problems installing, make sure to run the DirectX download EVEN IF you have the latest DirectX installed. These include additional drivers MISSING from the standard DX installer.
Minimum requirement still includes .NET 2.0, Google Earth and the Google Earth API.
Download the latest here: http://code.google.com/p/happykillmore-gcs/downloads/list?saved=1&ts=1291154906
Links to minimum requirements here: http://code.google.com/p/happykillmore-gcs/