Ask HN: Thoughts on Stashpix - mobile photo sharing *minus* social networking?

I'm a long-time lurker here at Hacker News, and I'm excited to show off my first product! My co-founder and I would love to get your feedback on our new iPhone app, Stashpix.

Stashipix is a photo-sharing application for iOS that allows people to find and leave behind photos wherever they go. While there is no shortage of apps that do that, Stashpix has a few characteristics that we think make it unique:

1. It's not a social network. You don't log in or create an account.

2. Stashes can be located anywhere -- they're not tied to a database of known "places", and we don't force you to create a "place" simply to post something.

3. Users must be within 100 meters to find, create or add to a stash, although once a user has created or contributed to a stash, he or she can view it afterwards from anywhere.

Stashpix.com has a short (52s) video that further explains the concept.

We'd love to get your thoughts on the concept, execution, obvious marketing challenges caused by not integrating social, etc... It's normally 99 cents, but it will be free for a few days if you'd like to check it out.

Thanks!

Mark Dascoli & Gavin Stokes Stashpix.com