Well in an attempt to get back out walking, Dartmoor and Coastal walks, ive managed to get bitten by the Geocaching bug ^^
Sooo ive signed up to Groundspeak.com , and loving it, also splashed out on the Active 10 SatMap ( to kinda replace my Garmin eTrek ) , though there is no software for the apple mac for the active 10 yet 
But it is really a great piece of kit, though if you go for it, then invest in the poly battery pack
Well ive got the battery pack too, was a little tuff replacing the battery holder with the battery pack, but with a flat head screwdriver and a little force it was sorted ^^.
I find using the active 10 in map mode a god send, as the pointers on most hand held GPS’s seem too point all over the place when you get real close to the destination, whereas the map mode you can see more clearly where you are at