So should we keep it simpler? Like no other players building houses in other players towns? Just building a town should be simple enough..it's raw data mainly..like earth 2020 or whatever it was called, just numbers..such as some database:
player Blahblah
houses: invididual house data like type (shop, inn, etc), tile data, any other data (like which town folk live in the house)
trees: type (fruit maybe? pine? etc)

We should be wary of how much data we keep but it can be kept rather low with simple numbers and a file naming convention that follows suit (like for a certain tile we can send 1, 2, 4, 5 or something like that which 1 could be the land it's found in, 2 the type (tree, brick, etc)..well you get the idea, and our file structure for images could follow suit so when the page draws the tile it'd look for www.blah.com/1/2/4/5/Image.gif..you know?