Three Steelers' teams among the "Top 20 Super Bowl teams"

Today, Pro Football Weekly announced its Top 20 Super Bowl teams of all-time. The Steelers are represented at the #2, #4 and #18 spots on the list, with the 1989 San Francisco 49ers ranked #1. Incidentally, weren't the Steelers the only club to defeat the 'Niners (18-1) that year? Click here to read the list.