Everypoet's award winning Haiku generator - note; something a little wonky with the page. A floating ad for smilies comes up and blocks it, and appears to be unclosable. Click on the link for haiku generator before it blocks it.

Lesbian Poetry-Haiku Generator kind of funny, and one of the better actual poetry creators I've found. The results are just more, er, poetic than others.

Peter's Haiku Generator, a very good one in my opinion. More options than most.

RAndom Haiku Generator-simple but enjoyable.