She's got her own website and newsletters, but please, those were so web 1.0. So in order to "join the 21st century," Gwyneth Paltrow has decided to tweet. And whichever verb it is when one uses Facebook.Paltrow signed up for both social networking services -- find her on Twitter here and on Facebook here -- and posted a short video of herself walking through New York City, talking to her new online friends.We're just waiting for the fashion and food advice in tweet form.Read More... More on Gwyneth Paltrow