Rose on interop
Michael Rose says that he's really enjoying Tinderbox, and suggests that richer Applescript support might hold the key to interoperability.
The problem with scripting in this context is that the script needs to understand all the systems intimately. Subtle changes and bug fixes can easily break scripts, so each new release of any tool might break your existing scripts.
On the interesting experiments front, though, try opening Tinderbox files with your favorite XML editor. That's the advantage of Tinderbox's use of XML: no magic, just files that are easy to share with other software.