  More than sixty years after the first intensity correlation experiments by
Hanbury Brown and Twiss, there is renewed interest for intensity interferometry
techniques for high angular resolution studies of celestial sources. We report
on a successful attempt to measure the bunching peak in the intensity
correlation function for bright stellar sources with 1 meter telescopes (I2C
project). We propose further improvements of our preliminary experiments of
spatial interferometry between two 1 m telescopes, and discuss the possibility
to export our method to existing large arrays of telescopes.
