Veto is a four-letter word (google quickview, here's the PDF):.Governor Schwarzenegger of California, at odds with the state legislature but ever the poet, vetoes Assembly Bill 1176 with a nice little acrostic.
Mesostics. John Cage invented this form of inclusion/acrostic poetry. Some examples by John Cage: Raphael Mostel, Mark Tobey, Marcel Duchamp, and Erik Satie. You can create your own through an automated mesostomatic process. Even cabbies have gotten in on the act.