What NFL team has the most Super Bowl wins of all time?

==Latest update as of 2009:== The Pittsburg Steelers now have 6 Superbowl wins, having won in 2009 in Superbowl XLIII. The San Francisco Forty-Niners still have the highest "percentage" of Superbowl wins with 5 wins in 5 appearances. Three teams are tied for the most SB wins of all time (5) - the Steelers, Cowboys, and 49ers.

The Steelers won Superbowls IX, X, XIII, XIV, and XL.

The Cowboys won Superbowls VI, XII, XXVII, XXVIII, XXX.

The 49ers won Superbowls XVI, XIX, XXIII, XXIV, and XXIX.