I have been obsessed with mobile payments lately, more specifically iPhone and Android devices replacing credit cards and loyalty cards. Jack Dorsey has developed an awesome concept with square, I got one of the first readers for my iPhone about a year ago (if I only created anything cool to sell). It will be interesting to see how far the incumbents in this business go to block entry of the new players wether they be Apple or Square, etc. I also like this idea from FourSquare with Amex…can’t wait to try it out.