I love my 405 and all of the heart rate and activity data that I create. Have you considred an interface to the Microsoft HealthVault? I would love to be able to reuse this data for other purposes.
Damn, I just started Microsoft Healthvault - and would love to integrate it with my Garmin Connect data in my old Garmin watch 405 CX... Please... Need a centralized way to view my health activities, relate it to my blood pressure without manually entering my exercise captured from my watch.