Another reason for only having two resolutions set up is that they use different graphics for each resolution; so, adding support for the higher resolutions will increase the number of graphics to be created & stored.
Besides, most people consider the 1024 X 768 to be a high-enough resolution, especially on smaller monitors. Even at home on my 21-inch monitor I only use 1024 X 768.
Now, if those of you using higher resolutions are willing to help create the required graphics, maybe Aaron would be willing to add support for the higher resolutions...
