Rightclick a link and select the contextmenu Open_from_Google_Cache.
When clicked, it will execute a google search with the "cache" keyword.
Example: A google search of "cache:www.dpreview.com/news/0709/07090601sonydslra700.asp
" opens the latest cached version of that page, if one exists.
This is useful for finding pages that may have just recently been updated by the site, but you want to try to find an old article.