Always cool to see more Hokies doing cool things :-). Turns out there are a lot of resources in town for this sort of thing:

Dr. Perez in Computer Science, he actually has done a ton of research in how individuals use information (PIM) including email.

It might be useful to do some competitive analysis as well: http://www.boomeranggmail.com/ (attempts solves the 'do this later problem')

As your probably aware MailTrust created by Hokie Pat Mathews and bought by Rackspace still has a pretty big office. I'd track him down and get some feedback from him.

My two cents, feel free to reach out ben at olark.