I've written a couple of plugins for s9y, with project logs in mind.
1. The todo list plugin shows a list of entries from a todo category and a done category, with the done entries crossed out.
2. The display archived entries by category plugin shows a certain number of entries in a chosen category. It is for displaying entries of an important category which you want easy access to, eg meeting minutes
You can get them from http://do.whileloop.org/s9y