I have been steadily working on my two blosxom plugins - this one and storylog. Storyfilter is now up to version 0.31 with the following improvements:

• Now includes documentation in the file itself, rather than in a seperate readme.
• Keywords treates as case-insensitive
• Only matches at the start of a keyword, for example, 'review' will still match 'reviews' but 'work' will no longer match 'network'

Download the current version (version 0.31).
Instructions are found in the file itself.