I looooove Wherigo caches, it's a really good way to play geocaching. It's more interactive than other caches types. The first time I tried geocaching was with my geo-girlfriend and it was a wherigo cache. After that, I opened an account and now I'm really geocaching-addicted (of every cache types ;-) ). Too bad the Android WhereYouGo apps is so buggy. Hard to play correctly thos wherifo caches.