Cloaking is when a search bot is given one page of content, while a normal user is given another set of content.
If you go to http://autos.yahoo.com/used-cars/forsale.html and compare it with the Google Cache version, to me they look identical. So possibly, Yahoo! changed it. But in the screen captures, only the Google version had the "used cars" anchor text by every state break down. You can see the before and after at Agerhart.com.
It seems like Yahoo Autos is currently not cloaking at this moment.
Forum discussion at WebmasterWorld.
Update: Tim Mayer of Yahoo! has confirmed on May 22nd edition of The Daily Search Cast that Yahoo Autos has changed the page since this has been reported. So, Yahoo Autos was cloaking. FYI, this wasn't the first time Yahoo! was caught cloaking, there also were spotted using unethical search practices in July 2005.