Long ago you needed forums on your web site. Then came e-mail newsletters. Next you needed a blog. And comments. Add RSS feeds, and an RSS reader. Your kids probably got you to text. Podcasts were the next big thing, followed by viral video, My Space, and Facebook. And so it goes: now it’s Twitter’s turn. From what was a community of a few million, Twitter suddenly hit its viral ramp-up stage within the past couple of months. Whether or not to join the crowd is the latest information-anxiety question on the minds of many people, particularly challenging for classically […]