A GeoRSS plug-in that published to the location module would be a great addition. The GeoRSS Module could be used to provide some insights, but currently (which may change at any time) the 5.x version is in the state of 'postponed'. GeoRSS is part of the SimplePie parser and is exposed in simplepie.inc.

/**
* GeoRSS Namespace
*/
define('SIMPLEPIE_NAMESPACE_GEORSS', 'http://www.georss.org/georss');

function get_latitude()

function get_longitude()