Ya, I don't know either. However when clicking through a few links in there to some other stories I found a map from the San Marcos Mercury that was very cool
https://maps.google.com/maps/ms?msid...8f32728b&msa=0
It has a bunch of the developments planned for San Marcos. I really wish Austin had a map like that. Or at least Downtown. I imagine it can't be that hard to do.