It amazes me how both obsessive and ignorant people can be. Educate yourself, please! Go out and read Robb Wolf's book, look for Loren Cordain, Gary Taubes, Mark Sisson online.. read WHY you are doing this.. not WHAT you should do.
So many people are on here looking for instructions on how to BE paleo when you should learn the science behind it and then you can choose for yourself. Otherwise, you're no better off than following the food pyramid.
Free your mind. Learn to choose for yourself. There, I said it. =)
Also, I obviously haven't read this forum at all and assume that you guys haven't read those books and have totally ignored the fact that many of you are talking about why. I'm just a troll. Here is a video of my cat http://www.youtube.com/watch?v=moyUDsBzWIA