BBS
I'm not sure what the current status of the product is, but you should try
and find out more about Steve Tibbett's program BBX. (Steve's the guy that
wrote VirusX, ScreenX, and other great utilities). I know he's been
working on it for a long time, and I'm sure it's something you'll want to
look at.
Steve's on here ever so often, so he'll be able to give you more info about
it.
Steve