I've built up a huge library of .emacs customizations over the years by getting little bits and pieces from others. I'm just starting with Conkeror but the fact that it uses JS (far more widely known than Elisp) must mean that there's some amazing stuff out there.
Care to share your pieces? I'm particularly interested in stuff that interacts well with pages produced by Django (or other dynamic web pages).
For example, I'd love a Conkeror-based action recorder that let me browse a site and find bugs, and then immediately save & submit the sequence of actions as a bug report with a single keystroke. By including the JS actions required to replicate the error, it would be the ultimate testing harness — even better than Selenium because it would be totally keyboard driven.