U.S. vs. MICROSOFT: Microsoft at the Razor's Edge; On the Inside: Soldiering On Toward Victory
Interview with Microsoft chief exec Steven A Ballmer, who was in Europe meeting with customers, when Federal Judge Thomas Penfield Jackson issued antitrust ruling against company; Ballmer reports support for company among European customers who want Microsoft's integrated products and foresees no let up in pace of deals; remains upbeat and intends to focus on next-generation products while appeals process goes forward; photos (M)