At the July MoMo London, Google told us about the new Gears Geolocation API. Well, today they released the first incarnation for Windows Mobile (5 and higher). The Google Mobile Help Center lists the compatible devices.
The API allows web apps run in the mobile version of Internet Explorer to access location information based on the device’s GPS location or cellid. As mentioned previously, an application (actually Google Gears plugin for Windows Mobile) has to be installed on the phone to allow the browser to access the new APIs.
It would be great to see the location API opened up further (via http) so that any kind of application (c, c++, Java ME), not just web applications, on any platform could get location information based on cellid. Now that would be truly useful.