First, the source:
Thank you to everyone who participated in voting for the Fedora 18 release name. The name for Fedora 18, the follow-up to Beefy Miracle, is: Spherical Cow Voting period: Friday 2012-04-20 00:00:00 to Friday 2012-04-27 00:00:00 Number of valid ballots cast: 429
That offset a lot of people, it seems. But personally I like it. I think it’s always a good idea not to take yourself too seriously.
Taking into account last Fedora’s updates I’d vote to Pedal Horse :)
The Spherical Cow is pretty close …
If you look it up in Wikipedia:
http://en.wikipedia.org/wiki/Spherical_cow
and then click on Russian translation, you’ll get the “Сферический конь в вакууме”. :)
Regarding pedal horses… http://www.youtube.com/watch?v=5RAhU9TmIMM