Some updates on our Geo Messages project site.
P.S. "Mobile operators should deliver location APIs specifically tuned for enabling check-ins, including the ability not just to place a user at a street location, but to a more fine-grained spot as well — for instance, the business at that location. Also, think about ways that existing telecom offerings could drive Foursquare-style services. For instance, could SMS become a major conduit into Foursquare the way it is into Twitter today (and the way Twitter is trying to explicitly link itself to Foursquare, as we saw above)? All it would take is some smart integration between SMS and network location APIs and servers." - from here. Great words. It is exactly what Geo Messages approach is for. It integrates mobile messaing and location.