I just went to Wiki to learn about Answers. :/ Wiki's comments are actually quite funny.
I see answers.com as the kids' version of Wiki. A lot more people are using it for joking around now that they see how high the results are in SERPs. Google still likes the answers quite a lot and you can find several similar answers to similar questions one after the other in SERPs. Another dupe content issue for Google PhD's to sort out...
I would like Google Search settings to allow filtering Wiki and Answers. In Preferences, add: The Hack Spam Filter! :/
I don't mind the eBay results which appear at the top; they are quite discrete.