Sourcebits (http://www.sourcebits.com) has launched DMG Architect–Disk Builder on the Mac App Store. It requires Mac OS X 10.5 or higher and costs US$29.95.
DMG Architect lets you create, burn and share disk icons. It supports AppleScript, among other features.
For the more advanced users, DMG Architect showcases full WYSIWYG control, as well as the ability to create and include your own end user license agreement. It also offers the ability to burn your project directly to a CD or DVD.