The flatness of the Universe is robust
  We combine the two balloon experiments BOOMERANG and MAXIMA-1 with our previous fit which used 9 constraints and concluded that the Universe is flat. The result is that the flatness is robust, $\Omega_0 = 0.97 \pm 0.05$. 
Matts Roos and S. M. Harun-or-Rashid (University of Helsinki)