One very useful thing you could add to this (if you feel like it) would be to make it work with snapshotted directories, rather than a single HTML file with inlined data. You can get the former with SingleFileZ and then extracting the resulting zip file.

I like these because it makes it easier for me to make manual edits when necessary and it's a better solution for long term archiving (IMO). But I would love to add your project to my workflow.