Reefer, those numbers on the Democratic Space predictions chart are projected guesses as to where the vote is going to land, based on assumptions about which pockets of any given riding are likely to shift one way or the other from how they voted in 2008. They are not hard polling data, and some of their guesses are going to be shown wrong tomorrow night.
Everybody has to make their own decision about how to vote tomorrow, based on their own criteria -- but saying somebody has to vote Liberal, even if they prefer the NDP, because 308 or DS is guessing that the Liberal is ahead in their riding, really isn't the most useful or reliable gauge to use.
And anyway, there's another reason that strategic voting doesn't generally work the way it's intended to: you're relying on about 80,000 other voters in your riding to make the same judgement call as you regarding which party is the better strategic choice, and you're relying on them all using the same factors and the same data to come to their conclusion.
Remember when Sid Ryan ran in Oshawa in an election some years back (I can't remember if it was provincial or federal), but lost narrowly to a Tory? Well, they polled that race afterward: the number of people who wanted to vote for Sid Ryan, but pulled back at the last minute to vote Liberal so that the Tories wouldn't get in, was larger than the margin of Ryan's loss -- meaning that if those people had voted their first choice instead of trying to be "strategic", Ryan would have won, but instead they ended up with exactly the party they were trying to block "strategically".
Ryan was actually the correct strategic choice in their riding, but enough voters "nationalized" their strategy instead and switched to the party that was more likely to win overall instead of the one that was more likely to win the race they were actually voting in.
Which is why my "strategy" has always been to vote for what I actually want, not for what somebody else tells me is the "correct" choice. I may or may not actually get it, but I definitely won't get it if I don't. If you feel that casting a "strategic" vote for your second or third choice of party is a better use of your franchise, then by all means, go right ahead and do that -- but by god, you've got to base that decision on what you're actually seeing and hearing on the ground in your own riding, not on what some amateur statistics blogger three provinces away thinks might happen.
