Pete Warden wrote in about his completion of the IE port of the GoogleHotKeys (formerly PeteSearch) browser plugin.
In addition to the blog posts covering the port I’ve also put together a public wiki with full documentation on creating your own Internet Explorer extensions, and there’s the full source code for the completed plugin for reference
When I checked out PeteSearch back in June, it was a pretty cool Firefox plugin that pre-scanned search results and added keyboard shortcuts to Google. Pete was just starting an IE version at the time, so it’s cool to see a first version released along with all the documentation you need to make your own IE plugin.
How to write extensions for Internet Explorer – Link
GoogleHotKeys (info, download and sourcecode) – Link
HOWTO: Port Firefox extensions to IE – Link