News: Foursquare for non-smartphones

Foursquare relies on GPS so as long as a phone has GPS and data access, I don't see why it wouldn't be possible for future versions.

FS does work fine from non-smartphone browsers, only trouble is you have to checkin manually because non-smartphones have no GPS capability so it won't automatically do location recognition and ask if you want to checkin. You have to checkin via a search for the venue, or if you've visited the venue previously, from within your checkin history.