I scan in adventure maps and Photoshop out all for the DM-only information (room numbers, secret doors, traps, etc.) and create a mask layer. We then suspend a digital projector (connected to my laptop) from the ceiling, pointing directly at the game table. I project the edited map onto the game table and scale it to match our miniatures. As the players explore the map, I erase portions of the mask layer, revealing the map beneath.
The Whole World Burns is the rephrase miniblog, containing links and other miscellaneous trifles.