Toronto will open their season on October 7th against the Montreal Canadiens and odds are available.
Odds for the 2010/11 NHL season are not all that easy to come by at this point however there are some sites that have markets open. The main site that has odds available is bet365 as they have futures prices in all the markets including divisional odds, conference championship odds, and Stanley Cup odds. The Toronto Maple Leafs are not considered a promising prospect for the upcoming season as they are +4000 (40/1) to win the Eastern Conference championship.
The good news is that the Leafs are favored to win their first game of the season which does not take place until October 7th. Bwin have odds open for a couple rivalry games that will take place on that date:
Toronto Maple Leafs (-115) vs Montreal Canadiens (-105)
Calgary Flames (-120) vs Edmonton Oilers (EVEN)