Inkling is a popular virtual textbook publisher on the iPad, and it's recently expanded over to the web, allowing students to access their virtual textbooks from anywhere. Now, the company is adding one more platform to its repertoire: the iPhone. The Inkling app is now universal, which means you can browse, buy, and read textbooks from the iPad, the iPhone, or the iPod touch.
I don't know how much this will add to Inkling's business. You have to t
