There is a rather large forum too, and it's filled with both english and german, as well as polish and whatever, fans of the game. And thus, fanfiction. Some is quite good!
A quick warning about that site. There is a zero tolerance policy on DRM/Piracy discussion there. The moderators are more than happy to lock any posts they don't like. Unfortunatly, the somewhat convinced the users there that hey are the best on the planet (I started a thread complaining about the mods, and flamed by all the users there
)
X3: Terran Conflict is a good game, but it still needs some work. The developer, Egosoft, just does not know how to test for bugs, so their games are crap at release. Update it before you even play it.
You can get from Steam and various other websites. Fry's Electronics sells copies at their stores.