You might not have notice my testing of a WordPress plugin based on the Simile Timeline widget. In case you didn’t, you can view my timeline experiment here.
This particular instantiation is simply pulling all of the categories from my blog and dropping the posts into the timeline. It’s fairly customizable. It’s very customizable if you can write any Ajax (which I don’t, yet). But just by flicking some switches you can select different time units for the upper and lower portions of the timeline. Pretty cool stuff.
Update: for a cool timeline experiment, see this Colby Cosh post.