My team and I have an app which we\'re going to be submitting to the store pretty soon, but we know that we\'ll be selling the app to another company in the near future. Doe
I don't believe that you can transfer ownership to another account. But a simple solution would be to add URL schemes to your app to allow data to be transferred from your app to a new app that your customer would release with the same source.
The new app would have to be free though (maybe the lite version?), so your old customers wouldn't be forced into buying it again. The only real downside I can see of this is that the new app would basically be starting over again from a marketing perspective, which is no minor thing of course!
Mobile Orchard had an article on data migration from Lite to Paid versions of an application that may be of interest:
Lite-to-paid iPhone application data migrations with custom URL handlers