Who is played in the most Super Bowls ever?

Through Super Bowl 43, Dallas has been to the Super Bowl 8 times, Pittsburgh 7 times, and New England and Denver 6 times.

As of Friday, Jan 30th (2 days before Super Bowl 43) Pittsburgh, Dallas and San Fran are all tied for Super Bowl Victories at 5. (If Pittsburgh wins Super Bowl 43, they will be the only team with 6 Super Bowl Victories.