here are this year's lists...
NFL
MLB
NBA (2004)
NHL (2004)
Soccer
From the looks of things, here is the top 11 amongst these Sports (values in millions):
Washington Redskins: 1,264
Manchester United: 1,251
(this flipflop could have to do with recent sale to Malcolm Glazer)
Dallas Cowboys: 1,063
New England Patriots: 1,040
Philadelphia Eagles: 952
New York Yankees: 950
Houston Texans: 946
Real Madrid: 920
Denver Broncos: 907
AC Milan: 893
Cleveland Browns: 892