It strike me as a bit punitive that only Mac App Store applications are permitted to access iCloud and is probably a barrier to further adoption of iCloud by de

It strike me as a bit punitive that only Mac App Store applications are permitted to access iCloud and is probably a barrier to further adoption of iCloud by developers; particularly in light of the fact that there are certain legitimate classes of app for which the sandboxing restrictions have egregious impacts on a user's workflow. Consequently developers are forced to implement their own sync solutions (e.g. Panic Sync, and Omigroup's OmniSync) - which can be a hard component to get right and increases the overall attack surface of the application + its server-side sync solution. Or rely on Dropbox, etc which I'm sure Panic had good reasons to avoid (most likely 3rd-party vendor lock-in). Hopefully the WWDC will show Apple being more accommodating on this front, but I won't hold my breath.