Whilst of course I'm bound to say that Windows Live Search is the best mapping solution for Windows Mobile... of course there is also the Google Maps Mobile offering on Windows Mobile too.
The interesting feature in this solution is the ability to automatically find your location without a GPS.
A number of people have had problems getting the “My Location” feature working on Orange SPV devices.
When they try and do this you get the message “Your current location is temporarily unavailable”
One of my colleagues Peter managed to find the solution for Orange SPV devices - essentially you need to ensure the Orange security policy tool is disabled.
This can be done via http://spvunlock.rd.francetelecom.com/
You can check to see whether the cell information is being returned by the phone by checking Menu/Help/About and scrolling to the bottom.
In the “myl:” field you should see a ~ 14 character string, if it says N/A the phone isn’t sending the required information.