Geo-tagging your photos is kinda cool, and it's a feature that I would find interesting if I had a device that supported it, but I would make _sure_ to strip those tags before publishing the photos anywhere.
Would make a good Mac App Store ... app. And, perhaps, web service.
After all, privacy is the new green. On the other hand, you'll need to educate people about the dangers of meta-data, before you can attract them to use your product.
Write in Erlang. Surprisingly, Strip.er and Stripp.er are free...
Eritrea is an unusually disgusting dictatorship afaik, so they'll probably be happy to sell domain names (along with body parts of people with the wrong opinions). Lots of English words end in 'er', right? Another business idea -- offer to administer the top domain.