Hi, we're considering offering an iPhone app to our clients; a front-end to a large online file sharing/conversion, collaboration, workflow tool. The app itself will be free (though I'm sure there will be a license fee to them to include iPhone usage). I'm not sure which distribution model to use. Ad-hoc is too small; Enterprise as I understand it is only for internal use. The App Store is just awkward, there's no point letting the public download an app that is useless without the companion online system; plus you have the hassle of dealing with Apple approval for every release. Is there any other way? Are Apple open to requests for custom distribution methods?