The first Seinfeld ad that aired Thursday evening is just an "icebreaker" that will be backed by more substantive ads in the near future, Microsoft senior VP Bill Veghte has said in a company-wide e-mail leaked to TechCrunch. Indirectly addressing concerns that the spot doesn't immediately either promote Windows or criticize rivals, Veghte explains that the 1:30 spot is just part of a "first phas