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We present a determination of the Hubble constant from measurements of theSunyaev-Zeldovich Effect (SZE) in an orientation-unbiased sample of 7 z < 0.1galaxy clusters. With improved X-ray models and a more accurate 32-GHzcalibration, we obtain H_O = 64+14-11 +/- 14_sys km/s/Mpc. for a standard CDMcosmology, or 66+14-11 +/- 15_sys km/s/Mpc for a flat LambdaCDM cosmology. Incombination with X-ray cluster measurements and the BBN value for Omega_B, wefind Omega_M = 0.32 +/- 0.05.Comment: 5 pp., Accepted for publication in ApJ

AN IMPROVED MEASUREMENT OF THE HUBBLE CONSTANT FROM THE SUNYAEV-ZEL'DOVICH EFFECT