Examples of centos:
The Oxford Cento by David Lehman
The Dong With the Luminous Nose by John Ashbery
Bob Perelman; Finding His Voice; Tikkun (Berkeley, California); May/Jun 2007.
The fact that we live at the bottom of a deep gravity well, on the surface of a gas-covered planet going around a nuclear fireball 90 million miles away and think this to be normal is obviously some indication of how skewed our perspective tends to be. -Douglas Adams, author (11 Mar 1952-2001)
Visit Wordsmith.org for more on poetic forms.