Groundspeak's page is
here.
It works pretty well, though I don't get the compass since mine doesn't have the GPS in it. I installed it and when I ran it, a pop up asked if it could use my location to show caches. I tapped yes and it showed the closest 5 caches to me.
Right now it can't filter out the ones I've done and the ones I haven't, but using your home is not a good example of the use of the app right now (as the people on the gc.com forums are complaining about right now) It's great for being out somewhere and thinking "I wonder if there's a cache near here?"
Hopefully at some point, though, you'll be able to log in so it can filter out your finds and hides so they don't show up. It's still a valid 'issue' because if you travel places frequently, it may not always show the new cache placed if the others are closer. You can set the filter from 5-20 caches, however.
If anyone is planning to be at the
NoVAGO event tomorrow, I can show it to you. 95% sure we'll be there.