Ever want Firefox's inline search bar in IE (rather than the pop-up dialog offered in IE?) Here you go:

From IEForge, comes InlineSearch. Download from the product home page here.

CTRL+F to open or close the search bar. (And F3 / Shift+F3 to find the next occurrence.)

It's not a complete replacement, but it is absolutely nicer than the one built into IE 7.