I participated in the closed beta for Earth and Beyond and its quite good! Westwood is continuing a good line of games with this one. Its currently in the open beta stage now (anyone can play). The release date has been pushed back to the 24th (or later, I forget)
Supposedly, by Westwood releasing E&B, SW: Galaxies isn't going to be 'as groundbreaking' or 'genre defining' as it's said to be. (These are other players' observations)
Gameplay is pretty fun, the world is HUGE, and it looks great (eye candy is nice). Many neat innovations. It does not, however, have many simulation aspects... player skill does not determine his strength or survivability... its more like Everquest in space. Seeing that I've never played Everquest, that comment might not be too accurate

Its fun, download the beta and give it a try for yourself before the open beta is finished (maybe a week or so left).
oct out!