Hot Potato combines the news feed aspect of Facebook with the location features in services like Foursquare. You choose a verb (like “attending”) and a location (like “the Super Bowl”) and Hot Potato will post this from your account. The idea is to connect with other friends who might be doing the same thing, or to keep friends updated about your activities. Friends can then comment on what you’ve posted. For those friends not using Hot Potato, you can push your updates to services like Twitter and Facebook. Hot Potato also offers rewards, much like Foursqare’s mayorships and badges.
It’s not immediately clear how or if Facebook will integrate Hot Potato with its site. Earlier this week, Facebook unveiled Places, which allows users to “check in” to certain places from their Facebook accounts.