I had a similar idea but lacked the technical skill to do it. What do you think of this:

A virtual machine on a disk image (possibly on something like amazon EC) that had preconfigured web server, email server, irc, forum, etc with simple customization scripts that prompted the new local group to enter a few key details and get them up and running quickly. Generic logos with obvious places to customize them (and the software to do it) would help too!

Of course, you'd always have the wackos accusing you of malfeasance of some sort