What do the Habs have that the Sharks would want? Sharks only have a need for a third line winger that can fore-check. They don't need d-men or goalies and the only forwards that the Habs have as a rental are Travis Moen, Andrei Kostitsyn, and Mathieu Darche. None of those guys fit the Sharks' needs. Unless the Habs want Niittymaki for nothing, there's no conversation to be had here.
Michal Handzus is not available as they just signed him this off-season and DW does not trade guys he just picked up until they're given at least a full season to fit. He also has a no-movement clause and I don't see why he'd want to go from San Jose where he just signed away from Los Angeles (two playoff teams), to Montreal (non-playoff team).