Btw I run http://www.UniversityTutor.com
The whiteboard idea is attractive (Tutor.com has made a pretty large business out of this). I haven't seen it be very effective though, especially for math/science tutoring.
- you can't write equations/diagrams nearly as fast/well with a mouse.
- purchasing a tablet surface for every tutor AND student (similar to what Sal Khan uses) is usually cost prohibitive and a technical hurdle for some.
- also, just simple stuff like looking at their textbook together can't be done well over the internet.
Btw didn't mean for this to come across as critical but was honestly curious what your ideas were around solving some things like that and taking on tutor.com? If you want to chat more I can be reached through the site on my profile.