We have lots of guides to help you through the installation process. Check them out here. We welcome contributions on Github if you see one that's incomplete or want to add one.
Yes, but you may have to configure some settings differently. Check out our shared hosting guide. If you're using Dreamhost we have a community-written guide for Dreamhost users.
Not yet, but it's on our wishlist.
We support multiple users through separate domains. See this issue on why it works that way.
OpenPhoto currently supports Amazon S3 and Dropbox for self-hosted sites.
Yes, you can use the scripts available on our Github. We have a Flickr export script and an import script available on Github. You can also configure something like Ifttt or Pi.pe to continuously import photos from a site.
Yes! Download the app for iOS or Android.
This is normal. OpenPhoto configs are bound to a site, not a server. Since a site is defined by its hostname, you can have multiple sites on one host provided that they have different hostnames. So go ahead and change your settings.
Report it as an issue at Github. If you don't feel comfortable exposing a security issue, reach out to someone on the core team and email us individually.
Check our issue tracker at Github first; if the issue you're encountering isn't already there, then start a new issue and describe what you ran across. The more detail you can give us, the better.
If you have questions we're always around to help. We've got several contact options listed on the contribute page.