Excellent work!
What kind of foam tiles are they? Ceiling tile? or did you just buy a 4x8 foam board and cut it to size?
After looking at your site I came up with some ideas for my own modular battlefield:
Use simulated campfire sets to simulate still burning buildings:
http://www.accuratelighting.com/HOsc...l_Campfire.htm
Some of these Diorama parts could come in handy
http://www.hobbico.com/modelmaker/hcas9200.html
This turntable could add a twist to a game by putting it in between two sets of 6 tiles, you'd have to manuver onto it to cross the gorge (river, stream, whatever), then manuever off it to get to the other side. This would be great for Capture the Flag.
http://www.hobbico.com/modelmaker/hcas8500.html
Remember the game STRATEGO? You could make say 20 tiles and each person gets to choose ten. Then each person gets to put the tiles in any format he wants (use a blanket or something to hide what the other guy is doing). Slide both sets of ten together and your ready to go. This would come in handy if you make some minefield tiles. Make the tiles with equal holes for magnets, say 20 holes per tile, and give each combatant 10 or so magnets to put where they want (velcro the grass on or something).
Tyson