At the meeting of the BookSense.com Users Group on Friday, June 1, at BookExpo America, BookSense.com Director Len Vlahos and other members of the BookSense.com team discussed some of the e-commerce site's newest features, as well as several planned enhancements. The "Next Big Thing," said Vlahos, is the site's eventual migration to Plone, an open source software that will allow for a much more nimble and dynamic BookSense.com.