Thanks for the reply. Can you tell me the exact behavior when Reloads run out? Even 50k seems like a small number, especially if iterating frequently. (A 2nd question: do Reloads block UI, or continue using the old version until background updating is done?)

It looks like I could potentially roll my own updating solution on Trigger using the File API. I didn't realize that Trigger was feature-comparable with PhoneGap + plugins. I'll evaluate a little further.