I am a keyboard command junkie but there are only so many shortcuts I can remember from day to day. That's why I started using KeyCue a year or so ago and I highly recommend it to anyone who relies on keyboard shortcuts but has trouble remembering the many hundreds that are available at any given time - which, face it, is most of you.KeyCue gives you an instant overview of all the menu shortcuts available to whatever application you are working in. You trigger it with the Command/Apple key and there you have all the shortcuts you need at a glance.
Ergonis, the developer of KeyCue, is also the dev behind PopChar, which many of you probably already know and love. KeyCue is for keyboard menu shortcuts what PopChar is for special characters.
KeyCue 2.1 is the latest update and requires Mac OS X 10.3.9 or newer and it's Universal Binary. It's $20 to buy, but you can try it for free. The upgrade to 2.1 is also free for anyone who bought KeyCue in the last 2 years.
TUAW-lover Andrew accidentally discovered that if you select a file in the Finder and press Apple + Shift + B (aka Command+Shift+B), it brings up the 
