I tried out a newer version of the flashplugin from the Gutsy Backports Repo yesterday and thought I would share my findings. With the newer version the full screen option is available and working! The quality is not perfect in full screen mode but it is nice to have the option and the display is usable. I will have to make comparisons using my wife's Win XP machine to see if the Linux version is the same as the Windows version. The image quality may just depend on what I chose to test with.
Anyways, I just wanted to share my findings with the community.