I am not a big fan of the MLS, but I think the campaign to promote the Vancouver Whitecaps in their first season in the league (next year), is pretty slick. I really love the way they are promoting season ticket sales, both with the videos, and their site itself. Check this out:
http://vancouvermls2011.com/tickets
I know they have deliver on the pitch etc. etc. and they are lucky to be starting their MLS adventure in a newly revamped stadium, but so far I give them full marks for effort :)
http://vantv.neulion.com/mlsvp/console.jsp?catid=1981&id=10666
Sorry, this vid is not on Youtube yet