A lot of people are making false equivalences to Kerry 2004. They say Kerry was ahead in 2004 in the polls, he wasn't. They say Kerry was ahead in early election results too, he wasn't. They say Republican's always do better on Election day compared to early elections, they don't. Check out Chris Bowers post on this subject for the real dirt.
But check out this chart of the polls in 2000, 2004 and 2008. Obama is doing so much better than Kerry did and much better than Gore did as well.
I am not trying to dampen your enthusiasm for Obama, I want you to still donate and volunteer. But stop being so defeatist, it is counter productive. Feel the joy of being ahead, revel in the fact that history is being made, in a good way. We will have a black president elected on his merits and because people think he can chart a way out of the morass the Republicans got us into.