Collaborators: Ann Zabludoff (University of Arizona), Jacqueline van Gorkom (Columbia University),
John Mulchaey (OCIW), D.J. Pisano (Australia Telescope National Facility), Barbara Williams (University
of Delaware)

We are currently using VLA and ATNF mosaics to completely map the distribution of HI in a sample of poor groups of galaxies.
Here's a sample of our mosaic of  part of the NGC 2563 group.  A number of galaxies in the group have extended HI envelopes
And there are even some interactions in the outer parts.