Haven't tried SWG yet... I've heard that it's been really ruined with the changes.
I tried playing the game
right after it was released, and found it to be unintuitive and hard to get into. To each his own of course, but after hearing about the massive changes the SWG team made to the gameplay and watching some movies of it i'm actually tempted to give it a try again. It actually looks fun to play this time around.
Alas for the dual-monitor inclined, here is what I found on the official SW: Galaxies tech support forums:
Thank you for posting, dual monitors is not supported for use with StarWarsGalaxies.
From what i've observed in other threads it looks like it is possible to run the game in one window and all of your other windows clients, Word, IM, etc on the other. Anyway, if you are interested here is a nifty thread where we were talking about dual monitors a while back:
http://www.widescreengamingforum.com/forum/viewtopic.php?p=51718&highlight=jupix#51718