Streets spec? While it looks like most of our construction will have been completed by the event (Potter 2.0 notwithstanding), we still have the same issue as last year vis a vis the SuperStar parade. Some of the most fun zones I've experienced over the years have tended to be in New York and Hollywood, which is prime parade territory. On the other hand, we still have San Fran, Central Park, and parts of Kids Zone as good places for fully themed scarezones. (Shrek Alley too, maybe?) And I think that acceptable theming can be done along the parade route using props moved in/out after park close.
While I did enjoy last year's street experience interactions, I really do hope they do not use truly "roaming" hordes again. As many have stated, it was a bear to try to keep track of where everyone was at any given time (although the occasional overlap of multiple hordes was quite the blast). But, whoever at UO is reading this - PLEASE PLEASE keep the "no safe zones" in place. That was one of the biggest losses for me as the event grew, and I genuinely loved knowing I could be accosted just about anywhere this past year.
I like Jeramy's idea of the RFID tech being used as a trigger of sorts in the houses and streets. I suspect there will be bugs the first couple of weeks with whatever they try, but that is the nature of the beast, and I'm willing to be patient while all is ironed out. And I really do hope some of our tests and trials will include street scareactor interaction - never know who's hiding that scanner under their cape!