This sounds really cool. The original I6 Ravenloft module had beautiful blue & white isometric maps of Castle Ravenloft. I seem to recall there being an old school blue & white isometric map of a dwarven mine cavern or some such in one of the original Dragonlance modules as well. I'll have to dig out my Dungeoneer's Survival Guide now.

CC2 Pro has an add-on called Perspectives Pro which allows you to do isometric maps. It's been updated to work with CC3. I've always wanted to try doing something with that.