As you may recall, Topeka, Kansas changed its name to Google as part of a bid to become Google's fiber optic network test market. And now Google, being the impish little tricksters that they are, decided to fake-ily change their name to Topeka because it's April Fools' Day and that's the best they could come up with. Jesus, you could have at least said the internet was broken and not returned any search results all day. Pussies.
A different kind of company name [googleblog]
Thanks to Rbekah, Wesley, Jackie and Sable, who agree it would have been a lot funnier if Google just returned a 404 Page Not Found.