how fast did i really go
GpsActionReplay have been looking for this kind of GPS tool for a while – should have thought to look for an application made by / for windsurf speed sailors… Just need to download a .gpx xml file (i use easygps) containing data for a route and then load it into the gps actionreply applet to analyse your speed over a journey (on the bike, motorbike, snowboard or windsurf session)