After serving as president and chief executive officer of Guitar Hero, as well as COO at Yahoo, Dan Rosensweig switched to the task of building out college textbook rental service and student network chegg.com. The Santa Clara headquartered firm now boasts over 500 employees and has warehouses in Pasadena, San Francisco, Utah, Oregon and Kentucky.

One of Rosensweig’s investors is Ashton Kutcher, front and center in a recent LA Times article by Andrea Chang about the increasing intersection of celebrities and tech startups. The chegg.com president and CEO explained how he interacts with the Two and a Half Men star:

Rosensweig said Kutcher occasionally visits the startup’s headquarters, recently meeting with the product team for four hours. One Friday afternoon, Kutcher sent an email saying he had spent a couple of hours on the site and had put together a lengthy “series of notes” on his ideas for improvements.

Although Chang’s article doesn’t mention this, it also probably helped in the case of chegg.com that the firm was founded in 2007 by a trio of Iowa State students. Kutcher hails from the Hawkeye State and attended the University of Iowa.