The one in the feed was for Word 2007 specifically and appeared 07jul09 as
Custom Guide’s Word 2007 Quick Reference
The following is from the TechCheatSheets.com About page:
Tech Cheat Sheets is a collection of the best cheat sheets and quick reference guides on the web. Arranged by tags, you can subscribe to a feed for only the tags you want to monitor. Visitors can also give the listings 1-5 star ratings.
I also got the Quick Reference Card for Publisher 2007, which I use for my newsletters.
There are also Quick Reference guides for Mac and Adobe software available at CustomGuide.
Check out both of these resources, very helpful in my opinion.