Spectroscopic monitoring of Southern Galactic O and WN stars: State of   the Art in 2007
  We are conducting a spectroscopic monitoring of O and WN -type stars in our Galaxy. In this work, we summarize some of our first results related to the search for radial-velocity variations indicative of orbital motion. 
R. Gamen, R. Barba, N. Morrell, J. Arias, J. Maiz Apellaniz, A. Sota,   N.R. Walborn, E. Alfaro