Routledge has dedicated two issues of their Collection Management journal to patron driven acquisition.  Volume 35, issues 3 & 4, 2010 – Patron-Driven Acquisitions:  Current Successes and Future Directions. The issues cover 4 general themes – introduction, acquiring print books through ILL requests, acquiring patron selected eBooks, and innovative services/new directions.  I think it’s great they are providing an overview of how patrons have traditionally requested items (via ILL) in addition to the newer eBook models for short-term loans/leases and purchasing.  I’m happy to see an article from Michael Levine-Clark from the University of Denver.  I’m hoping to have an audio interview with him later this summer about PDA.