Sooner or later, every popular web service with an API spawns a Google Maps mashup. FourWhere, which launches today, combines data from the increasingly popular location-based social network Foursquare with a Google Maps-based interface. Thanks to this, you can now easily find Foursquare venues around your current location or a location you plan to visit. The site was developed by social media analytics service Sysomos.

The FourWhere service itself is pretty basic. You simply browse the Google Maps interface and a right-click anywhere on the map will bring up a menu that allows you to either see nearby venues on the map or user comments about these nearby venues. In the future, Sysomos also plans to add additional services based on the company's extensive database of social media sources.

First Step Towards Integrating LBS Analytics Into Sysomos' Main Services

As Sysomos co-founder Nilesh Bansal told us, the company plans to bring location-based sources - including Foursquare - to Heartbeat and MAP, Sysomos' professional social media and analytics and media monitoring applications. For Sysomos, launching a free service is just a first stop towards learning more about this space.

As services like Foursquare, Gowalla and others continue to gain momentum and slowly inch towards the mainstream, social media monitoring services like Sysomos or Radian6 need to give their customers to monitor these communities. If these services go mainstream, a bad comment on Foursquare about a restaurant could easily have the same effect as a negative Twitter message or Yelp review.