SJAMESON'S IRISH BAR, BOSTON, MASS. — If you'd gotten over that unclothed photo of Robert Scoble and Naked Conversations coauthor Shel Israel, here's a new one to haunt your memories. Scoble, Fast Company's pet videoblogger and social media guru, was in Boston for the EmTech conference, and he wanted to go to a bar. Why? So he could sit at a table and ignore everyone around him, constantly reloading FriendFeed, the Web-activity tracker on which he relentlessly documents his nonparticipation in the world which surrounds him. Two startup executives who had just watched the Red Sox play at Fenway Park with Scoble told me he Twittered nonstop through his visit to the Green Monster. The only time he was separated from his iPhone? When he lent it to me to take a picture of him. That didn't turn out, but I found another pic Scoble had taken of himself, fresh out of the shower.