Just doing some PowerShell stuff to forget I could have been in Las Vegas for MMS 2010, I stumbled on this PowerShell Quick Reference.
Quick reference guide to commonly-used Windows PowerShell commands.
For best results, open the file in Microsoft Word, print the contents to legal-sized paper (8 inches by 14 inches), and fold the resulting printout in half, making a four-page booklet.
Roel van den Brand found an error in the Sheet. http://twitter.com/roelvandenbrand/statuses/12505089957
Thanks Roel for finding this one.
I've contacted the owner of the sheet. So hopefully it will be corrected soon.