Hi,
I would like to see many community-based enhancements and I'll list them as separate threads as instructed in the sticky.
I'm really surprised that Garmin hasn't integrated their brand community with Gramin connect. One easy way to start is by integrating comments into the activities. I believe it would be very important for other users to be able to give comments a plus or minus (look at the engadget.com comments for a good working example here) so that the better comments stick out.
This enhancement would allow Garmin to start bringing folks together. Imagine what happens when Garmin users who meet at Garmin connect start meeting up to do activities together. This could be really powerful.