found this on wikipedia and thought it was rather interesting that TFC is at the bottom of the list (out of teams that actualy have sponsorships). I thought they'd be closer to the top.
Major League Soccer Jersey Sponsorship Deals
Los Angeles Galaxy - Herbalife - $4-5 million per year
Seattle Sounders FC (2009) - XBox 360 Live (Microsoft) - $4 million per year
DC United - Volkswagen - $3.1-3.7 million per year
Chicago Fire - Best Buy - $2-4 million per year
Chivas USA - Comex Group - $2 million per year
Houston Dynamo - Amigo Energy - $1.9 million per year
Toronto FC - Bank of Montreal - $1-1.5 million per year
Columbus Crew - Glidden - $1 million per year
Real Salt Lake - XanGo - $1 million per year
New York Red Bulls - Red Bull - Part of $100 million deal for team & stadium
Philadelphia Club (starts play in 2010) - No team details announced yet.
Kansas City Wizards - no jersey sponsor
New England Revolution - no jersey sponsor
Colorado Rapids - no jersey sponsor
FC Dallas - no jersey sponsor
San Jose Earthquakes - no jersey sponsor