Carl Bialik writes "The Wall Street Journal is reporting that Prince, Snoop Dogg, Ludacris, Bon Jovi, and U2 all have used technical support when on the road, when their Wi-Fi or Xbox or Sidekick needs servicing. The Journal takes a look at the lives of the essential, if overlooked, members of the entourage, the support tech. Joshua Kapellen, of Best Buy's Geek Squad, has been on the road with U2 since 2004. From the article: 'Last March, lead singer Bono needed his Xbox connected while the band rehearsed in Canada. Mr. Kapellen got a call. He hooked up the contraption and a few minutes later was playing videogames with Bono. "It was one of the coolest things that has ever happened to me," says Mr. Kapellen.'"