Having left IE some time ago for Firefox (and never looked back) I found this page very helpful. Still, I managed to miss this one, and it’s great:

You can use “/” to search, via the “Find As You Type” search! Just hit the “/” key and you get the search dialog, in focus, type in your term and it finds the result… just like vi!
Yeah, I know it’s an old feature, but it’s new to me… 🙂

ZIPDeCode is a very cool Java app that displays the location of a zip code, visually. Try it. It’s very cool.