Star Wars: The Old Republic's first paid expansion pack, Rise of the Hutt Cartel, will be released on 14th April.
It's $20 to non-subscribers, $10 to subscribers.
Rise of the Hutt Cartel ups the SWTOR level cap to 55 and adds a new planet called Makeb, where there be fat worm gangsters of the Hutt Cartel. There's tough new story content based around all that, and space-caches of new loot to uncover.
Star Wars: The Old Republic is free-to-play now, remember, although there are some restrictions in place until you splash a bit of cash.