I hear some sort of team up in Philly got BIMBO to sponsor and they had it put on their jerseys. Soccer fans know BIMBO has been sponsoring teams for years, but of course, Philly USA has raised a stink about it citing it offensive. Wish I could find that article again.
As for advertising on jerseys and such, I don't mind it as much because honestly I'm not paying attention to what is on some guy's shirt while the game is on. I really don't notice it anymore and sometimes almost prefer the ads because they've become ingrained in the soccer culture. I don't think ads should be added to the NFL, MLB, NHL, etc. because the culture of those leagues never needed them. However, I think Americans can be accepting of it because they already do to an extent. NASCAR's culture is completely based on ads. You can't go down the street, to school or wherever and not see someone sporting an ADIDAS, NIKE, FUBU, etc. shirt and gear like a walking billboard.