If you've been to a tech event since SXSW in 2006, you've probably seen some kind of large monitor displaying info from the conference-goers. Often, this means Twitter tweets by attendees. Brightkite has just taken this a step further
, with their own "Wall" feature. Because Brightkite is a location-based service to begin with, the wall has a built-in way to gather data. This means the usefulness of the wall isn't limited to events: you can just display it in any place (like a coffee shop, for example) and show all the people who are posting messages nearby.
I love the Brightkite Wall. It could turn out to be a brilliant way to show new users what the service is all about, as well as making an interesting public installation. It also opens up Brightkite to people who don't even have Brightkite accounts: you can put the appropriate location at the top of the wall, next to the Brightkite shortcode, and anyone can text a message onto the wall via SMS.