Of course I'm running a session tonight for which this would be a great solution. I do hope integration of Dungeon Scrawl rolls out quickly so we can begin using this tool. I played with it for the first time today, and already it is scratching a grognard itch I'd nearly forgotten about. I don't know what the final integration will look like, but there is a step along that path with a great deal of utility: Roll20 has a map layer tied to a DS map Dungeon Scrawl has a "publish map" button. GM draws the DS map in one browser tab and hits "publish" to update in the Roll20 tab—including increasing the grid as necessary. This basic functionality would solve 90% of my dynamic-mapping needs. Sure, there are lots of "nice to haves," like visible tokens in the editing window, lighting, etc. But I hope you won't let an ultimate goal of seamless integration prevent a clunkier—but extremely useful—interim solution.