I'm also interested in this but have never done it...
Once you create the multiple boards, then what - is it as simple as specifying the BoardID in the app.config of each site?
If it is that simple, can I then apply different security models to each site ie. have all 10 forums on site 1, only forums 1-5 on site 2, and forums 6-10 on site 3?
I hope I'm explaining my question correctly :?
Camp4WD - looking forward to YAF in '09!