A new build of the sole Windows Mobile Foursquare client called WinMoSquare was released to testers yesterday and it finally works. The original Alpha build was the only version that was capable of semi-accurately finding your location. Subsequent builds would not come even close to your location without first going outside and waiting for a full GPS fix. Usually, the locations were about 2 towns away from where you actually were. Luckily this version adds (brings back) proper cell tower triangulation as well as WiFi location and IP address location capabilities. The new version is available here as a CAB file and requires .NET Compact Framework 3.5. The old version is still in the Marketplace here.