I know a few people who got invites, sadly I wasn't one of them.
They indicated that this Oceanic testing period would help them determine when Swtor will be released in these zones. It's entirely feasible, that if this testing period confirms that everything can run fine with a California based server, then we might be included in the NA release schedule and get a similar deal to what we've been used to with Wow / Aoc / Rift etc. This, however, will not be good news for people that may have hoped for a server physically based in Aus.