I imagine you've already seen @darius's totally rad Twitter Archive Zip -> Static Site tool:

tinysubversions.com/twitter-ar

Three things I really love about Darius' work on this:

1. It uses your browser, you don't have to install anything.

2. It runs *locally* in your browser. No data actually leaves your control, which is important because your DMs and other things are in the ZIP file.

3. It's also a fun project for CSS heads to experiment with new designs. Kind of like a CSS zen garden of yore.