So far this page isn't much more than a link to another cheat sheet!!
http://mortar-public-site-content.s3-website-us-east-1.amazonaws.com/Mortar-Pig-Cheat-Sheet.pdf
On this theme, check out my how do i load a fixed-width formatted file into hive? (with a little help from pig) blog posting.
Here are some other topics of interest.
Blog Postings on Pig