Hi - i use a sony clie, running the same Palm OS as your M125 - i use QuickOffice - as a word viewer - i download the waypoints into my Etrex using a cable - but with the cache details i copy and paste (paste special, unformatted text) into a word document - delete the bits i dont want - save it, file name the waypoint and a short description, and then link it to my Palm with quick office and hotsync it - each file takes up about 8k, and is really easy to read and edit (especially multi caches - typing in the info and resaving the file.)
i also use a Blackberry and the wap.geocaching.com site when im out and about and that works really well also
if you need a source for quickoffice - email me and i'll help
bashstreetkids@blueyonder.co.uk