The FAQ on the site mentions a LEAVE command you can send in an SMS and/or email that is effectively an undo for a check in. Sounds nice to use when starting travel for instance; I can then check in at the new location I arrive at when I get there and I want Brightkite users to know where I am again.
How do I access that LEAVE functionality from the main website? I don't seem to be able to find it...
brightkite seems to have trouble with DC metro [area subway] stations. A few of them show up, but many are not recognized.
Part of the problem could be that a single train line can (and often does) go through Maryland, DC and/or Virginia. I know that causes trouble with finding locations, requiring a user to LEAVE before searching for a business in a new location.