This might appear a bit boastful on my part, but please do not take it that way. In my own humble way, I have attempted to implement 'location awareness' into the two apps that I have developed so far -- though to be honest with you I have no idea if it works on the N810, but it works fine on my N800. I used the code examples described on the following page:

http://pymaemo.garage.maemo.org/docu...les/index.html

My first app was for 'entertainment' purposes only:

http://www.internettablettalk.com/fo...ad.php?t=17569

My most recent one is a 'serious' app that benefits from 'location awareness':

http://www.internettablettalk.com/fo...ad.php?t=19545