Hmm, this looks familiar!
Yesterdays readings made me experiment with a tile based scrolling engine in flash.
Offcourse - Boulderdash is the best game to recreate :-)
Well, I think i'm quite happy with the results!
i haven't seen many engines around that perform better.

A new project is born: Boulderflash !
http://www.steffest.com/boulderflash/