Best of luck with that. I talked with groundspeak specifically about entering coordinates and it is considered "scraping" of their website and against their terms of use. An exact quote from them is this:
"... if your application is not scraping the site and users are required to enter the coordinates, then it is perfectly acceptable as is using the embedded web browser."
So if you auto-enter coordinates expect a fight.
I am looking forward to seeing your app in the app store.
If I implement it as I've planned, I don't see how they could have any issue because:
1) It's a webbrowser like any other that the user can direct anywhere. It'll allow the user to hit any site they want, and it does not even contain a link to Geocaching.com
and
2) Coordinate recognition is a general feature that has applications across many sites other than Geocaching.com. Just because their TOS prohibits it on their site doesn't mean I can't distribute an application with the ability to recognize coordinates on any site.
That'd be equivalent to going after Firefox for it's ability to block images that are sourced from a domain other than the current site (typically ads). Even though a site's TOS may prohibit users from blocking ads, it's ultimately the user's decision if they do it or not, and their liability if they violate any agreement they entered into with the site they are browsing.
Maybe there's a glaring hole in my reasoning that somebody will point out. I'm not advocating that a user makes use of this function to violate GC.com's TOS. It's just a handy feature that will make it easy to grab coordinates off any site.
Anyways, I'm really impressed with the community you've built around Geopher and how quickly you got it to the app store. I can only hope my app can have the same success.