There are lots of recipes around here for snacks and party fare. I dont know what the 'traditional' superbowl snacks are but here is a small list of what pops to mind:
Mixed nuts
Cheese Tray
Deli meat & pickle platter
Veggie tray w/ dip (this
spinich dip is said to be excellent) ... or some hummos
Roasted Chickpeas
Pepperoni 'chips'
Bean Salad (w/cukes, tomatoes & balsamic..yum)
Stuffed Mushrooms (or tomatoes if your not a 'shroom fan)
Jalapeno Poppers
....thats all I can think of at the moment, if I have another brain storm I will post more.
ETA: Thought of a few more
Deviled Eggs
Cucumber boats w/ chicken (or tuna) salad
Shrimp w/ SBD Shrimp sauce