Cool. I thought you meant FLEX as in FLEX / BISON but I looked it up and its some adobe thing unrelated so no idea what thats all about.

On the map front, what your describing is exactly a VTT. Although I don't know of any that do the time history thing but all the rest is exactly what ViewingDale is all about and id run that server if my web box was a windows box but it ain't. So I don't have a 24/7/365 machine to host it but in every other way thats a VTT. Forget thousands of dollars and 10 licenses. <$30 or so and your there. I keep trying to say how cool it would be to have this online editable world but I have not had anybody take up the gauntlet and run one on a 24/7/365 basis yet.