There's a great thread of Brewing Haiku on the HBD Forums.
Some of my favorites:
Mash temperature?
One-forty or so, I think.
Still made yummy beer.
My foolish in-laws
Say "Why bother making beer?"
No lager for them
Why make a starter?
Wyeast makes pitchable tubes!
Newbie frustration.
Been drinking since noon
Time to step up the mash temp
The skin should grow back
Do a full-wort boil
Oxygenate the wort well
Pitch a lot of yeast
Drinking barley wine
Wow, this tastes quite heavenly
Woke up on the floor