It appears that Yahoo has joined Gigablast and Clusty and is now providing direct links to "archived" versions of pages via The Internet Archive's Wayback Machine. You'll find a direct link to check to see if older versions of the page are available in the box at the top of every page that Yahoo caches. Look for the text link that reads, "check for previous versions at the Internet Archive." Click the link and you'll transported to The Wayback Machine to see if older copies for the page/URL you're viewing have been archived.
Optimising Digital Marketing Campaigns with Search, Social and Analytics
At SES London (9-11 Feb) you'll get an overview of the latest tools, tips, and tactics in Paid, Owned, Earned, Integrated Media and Business Intelligence to streamline your marketing campaigns in 2015. Register by 31 October to take advantage of Early Bird Rates.