There has been a few press releases coming out the the AAS meeting in Seattle:
http://www.aas.org/meetings/
but one of the latest is most interesting:
http://news.nationalgeographic.com/n...-galaxies.html
I understood the MW Galaxy had 13 dwarf satellite galaxies, I am not sure what the latest would take this number to.
some models of galaxy formation predict that there should be thousands of dwarf satellite galaxies created as part of the galaxy formation process, perhpas they are there but never formed stars or are too faint.