scummvm is also a great option. i don't know if a modern SDL app has any benefits over a dos virtual machine (or vice versa), but it just feels nicer playing it on a brand spanking new engine.
yeah. dott is one of those games that makes you really wish you could just forget the entire game and play it again. and again. and again. and...
i think dott is one of the most clever games i've ever played.