Natural20 Press might have had one.
The way we used to handle things with Ambient Inc. was:
1 page minimum, 3 pages maximum
10pt font
.rtf, .wpd, or .doc format
Should include:
-complete contact information: email addy, phone number, mailing address, IM contact names/numbers, etc.
-Broad overview of the product with chapter breakdown. Say how long the product is
-1 sample of cream (story-writing/descriptive ability)
-1 sample of crunch (game mechanics)
-status of the project (conceptual stage, partially written, complete, complete and illustrated, etc)
-references if you've written for someone else before, especially in the game industry
I'll bring it up with the rest of the team to see if they're in agreement.