I think your copy should be as crazy as you want it to be. That's part of the fun of give-away side projects: no one to approve your copy or coding style or whatever- it's a break from work-work (at least to me).
A word of caution however, I made an announce page for a toy project that was so silly no one even looked at it, even in a highly targeted demographic of users (reddit users; specifically those who post facebook screenshots) http://sequoia.github.com/afonigizer/ So no one looked at it, no one uses it etc.. But on the other hand, "whatever!" I had fun making the tool and the silly announce page and as the Odonians says: "the means are the end." :)
A word of caution however, I made an announce page for a toy project that was so silly no one even looked at it, even in a highly targeted demographic of users (reddit users; specifically those who post facebook screenshots) http://sequoia.github.com/afonigizer/ So no one looked at it, no one uses it etc.. But on the other hand, "whatever!" I had fun making the tool and the silly announce page and as the Odonians says: "the means are the end." :)