Whats the Deal with Polling?

Hey all,

I haven't had much time to update the blog the past few weeks, and you know that feeling about "the longer you leave it, the harder it is to go back?"

Well, that perhaps, is for another day. My question today....What's the deal with polling? We are in the middle of an election campaign and there has been dozens of polls telling us different things. One poll for CTV/Globe and Mail puts the NDP at 15 percent, the Liberals at 29 and the Tories and 36. A Decima poll the same day puts the NDP at 20 the Liberals at 27 and the Tories a little higher. Today, another poll puts the Tories at majority territory! Almost 40%!

How bizarre. I wonder if polling companies, and the media that run them, have agendas...or do they actually reflect voter instability?

In any event, its annoying.