I'd love to do an Asterisk/Freepbx presentation again; when I have 'spare time'.
I did one a long time ago but I'd want to have a lot longer since it is way too much material to cram into 2 hours; ideally I think it would be more fun if it were hands on and the participants actually set up their own PBX in a virtual machine. Asterisk and AMP (2004) have come a long way since 2003... some distributions such as PBXinaFlash and Elastix (Trixbox doesn't keep up) make it a lot easier to get started and much easier to manage. I have enough telephony hardware in my home office to set up a couple PBX systems on real hardware; would need space to lay it all out.
Anyway.. something that I've had on my mind for awhile.
JD