  We report on a large survey for double degenerate (DD) binaries as potential
progenitors of type Ia supernovae with the UVES spectrograph at the ESO VLT (SN
Ia Progenitor surveY - SPY). About 560 white dwarfs were checked for radial
velocity variations until now. Ninety new DDs have been discovered, including
short period systems with masses close to the Chandrasekhar mass.
