Over the past day, Pangea Software has issued two updates for their Enigmo physics game for the iPhone/iPod touch. The updates in question (1.1 and 1.1.1) allow you to download custom levels from Pangea's website via the application.
Be sure to sync your iPhone and complete the backup process before updating Engimo, as the saved game deletion issues continue to be a concern. Pangea has officially acknowledged the issue, and offers backups as a solution. You can download/buy Enigmo from the App Store (iTunes link).