Flipping Professional Development

One of the newest buzz phrases in education is "Flipping the Classroom". Basically students are assigned videos and tutorials to view in the evenings, either teacher-created or other, and then their class time is spent actually working on what they've learned. I attended a session at MACUL 2011 presented by Ryan Miller and had a bit of an epiphany during his presentation (here's the link: http://tinyurl.com/5wchncn). What about doing the same thing with professional development for our teachers? The week/evening prior to a PD session we could post videos and tutorials on what is being presented and then the PD time could be productive time spent actually discussing how the topic will affect and change what we're doing or actually using the software and tools if we're talking a technology workshop. Hmmm... What do you think?