If it already hasn't been suggested, a spell checker is a must and "alt" characters such as ° © ®... would be appreciated. Currently you can't use the "alt" key with certain numbers thus rendering special characters a "two step" process (aka cut and paste).
It would be nice to have magic wand masking to allow users to mask out windows and such to replace the view. It would be helpful for automobile, aircraft, and Yacht tours.
Also, if you could include a winning lottery number generator that would be helpful too