Sweatily peripatetic Microsoft CEO Steve Ballmer has been on the run lately. He's been launching salvos in his takeover battle with Yahoo from the unlikeliest of locations: First Morocco; then Milan, Italy; now Louvain-La-Neuve, Belgium. There for a Microsoft developers' conference, captured in a video clip, Ballmer told reporters what Valleywag readers have long known: Yes, he has a Facebook profile. Unlike Bill Gates, he tries to keep up with it.