PetVille's "Tweet For Cash" contest launches today

This contest runs today until May 12th. You can submit up to 5 tweets per day. Each day will have 10 winners who'll get 100 Pet Cash. And one grand prize winner of 500 Pet Cash will be decided on May 12th, 11:59 pm PDT.
That means we should have 31 PetVille winners by then. Will you be one of them?