Ah right, didn't know... my portal-based mass transit idea won't work then :-$
*builds skyways instead*
New Ridiculous Project Idea:
Anyone fancy helping make a replica of the Eden Project? It's their 10th aniversary or something, so we could claim that's why we're doing it if we need some kind of justification.
We could have a different biome type thing in each bit - one with cactus and sand, one with trees, one with reeds etc.