Audit-proof GPS trip tracking?
 

Any favorite programs? The goal is semi-automatic trip recording for business travel. Most of what I've seen is PDA-based or full hw/sw solutions for fleet tracking. We need the PDA directness but easy access to the data from other software. Creating something custom wouldn't be difficult but a proven system would be best come audit time.

GPS input is via NMEA receivers on Windows systems. The systems are already used for job reports where mileage recording is done manually.