The attendees actively participated in the presentation (I like to get their reaction to things) and asked some good questions back. In both sessions, people asked about battery swaps (Smarter Planet) and whether the grid could handle the extra load. The weird thing is that I created slides that addressed these issues, but I hid them because I was worried about time (the presentation took an hour with questions).
Throughout the presentation, the three central points that I kept reiterating were Cheaper, Cleaner, and Energy Independence. From talking to people after , they got the message...my work was done. If you would like me to present to your group, just let me know.