I have a site that allows users to create online textbooks. My hope was that it would grow through a "grassroots process" (I'm affiliated with a University), people would hear about it, and then it would grow some more. As my University is a bit traditional, it's been very, very slow to take off. Might anyone have some suggestions as to how to reach my target market, namely professors at universities? I seem to get email all the time from a couple of companies, but have no idea how they have my email address.