Go to your cupboards, see if you chose Peter Pan peanut butter or the Wal*Mart house brand, look on the lid and see if it starts with 2111. If it does you're a winner owner of a jar of peanut butter that could be contaminated with salmonella. Throw the jar out, but keep the lid because you can get a refund. Nearly 300 people in 39 states have fallen ill since August, and federal......