We used it exclusively when we went to railscamp New England and there was no internet. There is also hidden movie on the webpage.
I actually made good use of this on a hacking trip with poor connectivity. It's really a nice system.
I'm interested but it doesn't work in Ruby 1.9. I fixed the issues with Banajour itself but there are also several dependencies which don't work with 1.9 either. Too soon!
Looking forward to using this in RailsCamp Melbourne....well done toolmantim, really nice app.