The One True Incremental Search for Window Titles: iswitchw
Major breakthrough, People! Forget my Find Window script--someone has written a proper incremental search for window titles. Check out iswitchw--it's an AutoHotKey script that gives you a list of all open windows when you press Caps Lock (customizable). Then as you type, the list narrows down to only those windows containing what you typed.
I've got a bazillion windows open right now, and I can jump to the ones with "video" in the title by typing: [CapsLock] vid.