From the Ubuntu mailing lists:

Folks, allow me to introduce the Gutsy Gibbon, who will be succeeding
the Feisty Fawn as the focus of our development love in a few short
weeks, for release in October 2007.

Hehe.. Funny name i must say.. But then i think about Warty Warthog, Hoary Hedgehog, Breezy Badger, Dapper Drake, Edgy Eft and Feisty Fawn.. Anyway, whatever the name may be, Ubuntu ROCKS!