  We discuss possibilities and improvements which could be obtained, if a
phased array with a large number (N=50-100) of sub-millimeter antennas - like
the planned large southern array (the former LSA, now ALMA) is used for
radio-interferometry with very long baselines (VLBI) at millimeter wavelengths.
We find that the inclusion of such an instrument in global VLBI network will
push the sensitivity and the imaging capabilities of high resolution millimeter
interferometry by up to 2 orders of magnitude. This will cause many but todate
unforseeable new discoveries.
