A working demo.
0.1.5 is a stable release - everything works the way it should, although technically sprockets is not usable at this time since it does not support users and therefore everybody has permissions to modify/delete any post. Otherwise, it works quite well.
Also, a user could potentially put <d> tags in his post, making a mess of the database, though it would not affect parsing or display. This has been addressed and will be fixed in the next release.
There is a bug in the latest version with the modify function. I made a simple fix, but will not release the patched version until I release the next version. Since this is alpha, nobody is relying on it for any mission-critical things, so this shouldn't be a problem.