The current release of Jekyll is version 0.21 alpha. This release still has a few issues, but it is close to the point where it can be reasonably used in anger.
Soon we should be releasing version 0.3, which will be a major step forward. Version 0.3 completely removes all annotations from C files, instead using a non-deterministic translation system to reconstruct Jekyll information.
These features are largely complete and stable in the current version:
These features work to some extent, but have gaps in their implementation: