Although it seems pretty clear "we" will not be giving them our vote, it is also clear there is a three or more way split happening in the left wing of Canadian politics.
The Liberals have been steering hard to the left under Mr. Dion, and seem mystified to discover there are already political parties for that demographic. The Liberals themselves are split between the Chretien and Martin factions, although they seemed more centerist under Chretien. The NDP themselves see the Greens as a rival, and in Quebec, the BQ combine "Nationalism" with "Socialism" (and we all know how well that combination works). Of course there is also that one per cent of the vote the Marxist Leninist and Communist parties fight so vigorously to capture.
In practical terms, if the NDP can take advantage of the collapsing fortunes of the Liberals, while checking the Greens into the wall, they might actually emerge as either the official opposition, or the "king-makers" under some sort of minority or coalition government, similar to what they did to the Martin government. (Indeed it is rather mind boggling they don't make such a proposal now; the GG has the right to ask Mr Dion to form a coalition government without calling an election since they do have the combined number of seats to govern. This was the crux of the "King-Byng" back in 1926).
I don't think that this state of affairs will remain stable, nor do I think the split in the Left will translate into a Conservative majority government given 2/3 of Canadian voters will vote for left wing parties over the Conservatives. The Liberals may trigger an early election before they are seen to be irrelevant, and indeed given the hemorrhage of votes and funding may need to before too many of their supporters decide the NDP or Greens are the "real thing" and go there. The NDP may want the Liberals to limp along, so whoever succeeds Mr. Dion will have nothing left to rebuild. The Greens might be making a similar calculation. The Bloc have different interests, but their challenge is the revival of the Conservative Party in Quebec. What scenario is best for them is hard for me to imagine.