Logging GPS/Palm info about rides?

I have a Magellan Nav Companion for my Palm, and I'd like to be able to log my various routes to
work and analyze them for time, altitude, distance, average speeds of different stretches, etc.

That is, I'd like to take a ride, log it on my GPS-equipped Palm, then download the results to a
desktop computer and play with the data.

I've seen software for something similar at www.velotrend.com, but there's no interface with the GPS
(or, rather, their Bike Brain uses the only interface available).

Anyone use anything like that?

Thanks.

Greg

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