All good, I imagine you're wanting to publish the source when Spriteloop is stable?
Also, would you be open to supporting the .swf file format?Despite Adobe killing Flash, these formats are still used in projects (being used for Game HUD's).
There's only two FOSS projects that support swf however one of them is not production ready, and the other is more tailored towards children.
If you're not looking to/interested supporting this format, I am happy to just wait until the other project is ready instead.