Here is an interesting post about polls. This is a little taste:
So, could I be wrong? I have to be honest and admit that I could. But in that case, we'd have to ask why the polls do not generally agree with each other, why Gallup is trying to spin three different models at the same time to get a grasp of the picture, why McCain and Obama are both so interested in Pennsylvania, yet neither is working very hard in Ohio right now. We'd have to explain why McCain-Palin rallies are now attracting thousands more people than Obama-Biden rallies, why Letterman suddenly found it cool to have McCain on his show and SNL decided they wanted Palin on theirs. We'd have to explain why there are not a lot of Obama signs visible, but we hear about his army of lawyers getting ready. We'd have to explain why McCain and Palin appear to be so relaxed while Obama and Biden look like they're worried.Something to consider.