Decided to create a "digital version" of the city in which I live. It sounds a little nutty - but it's not exactly a stretch from what already exists (or is growing) online. What I think is interesting, is that no one has tried to do it on purpose.
At any rate I thought I'd start this thread and share some ideas of how I started, and continue to build a virtual (yet real live) city out of wordpress/mu/buddypress.
:o) I'll keep you posted.