MousePlanet:
If you're in DCA this week and run across some people running around with props and costumes, I may know what they're doing. WDI is apparently testing a new interactive experience at DCA this week: it was described to me as a Kim Possible-type scavenger hunt, but themed to the California Gold Rush. You might spot them on the West side of the park. I have no idea what the final iteration of this test might be (or if they'll even develop it into anything).
There was a rumor this was going to be themed to Disney Channel's
Phineas and Ferb series.