This is a cool idea—BookRenter is a startup in the business of renting textbooks (both hard copy and electronic) to college students.  The high cost of textbooks has always been a thorn in the side of cash –strapped students, and I imagine BookRenter could be a godsend to many.  With the advent of e-books, I imagine that services like this can be particularly effective and profitable, since e-books ostensibly require a less inventory intense cost structure.  The company made news today by announcing that Netflix co-founder Marc Randolph has joined its board of directors.