From Hashtag to Purchase: Twitter's Newest Partnership with American Express

Coming off the heels of last week's Bluefin Labs acquisition and an overly eager promotion from LL Cool J during Sunday?s Grammy Awards broadcast, Twitter was a part of yet another big announcement on Monday. This time, the news is about a big-time partnership with American Express that aims to make purchases as easy as a hashtag, tapping into the still nascent, but growing, social side of e-commerce.