see, the problem with the whitespace to the rigt, is that it really distracts the eye from the content ... because it is the brightest area of the screen ...
If it is noticable at a 1024 by 768 resolution displayed on a 15" CRT (i know, outdated, but does the job still very well) than it distracts the eye too much ... measured it is approx 4 cm (1.6 inch) of the available display area wide. That is more than 10 percent (remember, the display area is approx 1 inch smaller than the screenarea) ...
I don't want to be rude, but you should do something about this I think ...
cheers and keep up the good ideas(!)
Klaus