AbigailII: As for which games are or aren't suitable on a turn-based site, I would say that you hit the nail on the head. Rephrasing, I would say that the board image should include all relevant information.

This is unfortunately not the case of the current implementation of Crowded / Cloning Backgammon (checkers on the bar that are undistinguishable from checkers on the 0 point, stacks of more than 15 checkers which use a 15-checkers image).