Yes, it might be too heavy for running, I admit. But for cycling, not! I actually fitted mine to a triathlon bar using the holder unit which came with the Navicore Personal navigation kit, see a picture here. In Finnish only, sorry! And the location of the GPS module is not perfect - have to come up with a better place for it next summer. It's perhaps worth of noting that I even wished to have a similar functionality to the Navicore that the Sports Tracker now provides for S60

The live broadcast would need a mobile phone, and so three devices along (only exception being the N810 owners, of course). But they would go in the cycling jersey's pockets, too.

One example of my latest trips here.