It all started from a hobby.
Arrivals is a simple list of where your foursquare friends currently are. It is intended to be displayed on a spare second screen such as a tablet or phone without intrusively drawing attention.
Arrivals is based on a concept by Toby Barnes. Where’s Dad is a small glanceable display built for Toby’s son for use on a spare old iPhone. Whilst Toby is travelling his son asks him during phone calls where he currently is. This display constantly shows his current location, city and country based on his foursquare checkins. A simple piece of situated software with an user base of one person. See Toby’s blog for more details of his thinking behind it.