We just started watching this DVD produced by two pediatric speech language pathologists. Emily was very engaged in it and I have to say after watching it twice she was babbling more than usual that evening. What I liked about it was that it taught me some simple things to do through out the day to encourage speech. It also goes over basic signs to incorporate. A good refresher for me.
Update: Emily now watches Baby Babble 1, 2 and 3. They have become her favorite videos!