Thanks cats_five, I have had a look at the EW microrecorder and it looks like the tool for the job.
Being pretty well clueless about this technology can I ask if there is such a thing as a basic PDA that would run well with it. I am not particularly interested in the whole range of functionality (and associated cost) that most PDAs have, I would be happy with a cost effective solution for the sole purpose of being used with the recorder on gliding and power flights.
Cheers,
BB