BrightKite SMS syntax

From the top of my head:

BrightKite basics

@address - check in at an address
@placemark - check in at a placemark. Note: you must have previously defined it.
!message - posts a message to your currently checked in location
?venue - does a search for venue near your currently checked in location and returns options to pick from
MARK newplacemark - creates placemark newplacemark for your currently checked in location.