According to Joystiq and James Ohlen there will be no cross-faction communication in Star Wars: The Old Republic. To clear this up a bit here is a quote from developer Georg Zoeller on the official forums.
If you haven’t seen these two The Old Republic videos yet, check out the GC2011 producer presentation and a sith warrior playthrough with Stephen Reid.
New gameplay mode unveiled in Star Wars: The Old Republic called “Hutt Ball”.
If you missed the Sony Gamescom conference here are some clips.
Call of Duty: Modern Warfare 3 PC version to support dedicated servers.
DarthHater: The Old Republic: GC2011 Day One Coverage