From the Star Wars Galaxies website we apprehend that "Starting now, you can download the full versions of Star Wars Galaxies: An Empire Divided™, and its first expansion, Jump to Lightspeed™, then jump in and play completely free for up to 14 days!"
To download the client and start the free trial follow this link .

This downloadable version includes all the game expansions Jump to Lightspeed, Rage of the Wookiees and Trials of Obi-Wan.

The most important updates between the recents ones have been: