I've been doing it off and on for a while now. I've found 38 caches in the last 12 days thanks to a spell of nice weather! I have 111 finds total.
If you liked easter egg hunts as a kid (who didn't?) and you like high tech gadgets (how many triathletes don't?), you'll probably enjoy geocaching.
I've done a bit of geojogging and geobiking lately. Basically, I get a list of geocaches in my GPS and see how quickly I can run/bike from one to another. It's a fun way to mix up the normal running/cycling routine.
-Mark Rebuck,
http://www.markrebuck.com/