A major update to FTL is now live, adding a new alien race along with new events, weapons, playable ships, drones, and more. It also adds additional musical tracks by Ben Prunty, and events by Tom Jubert and guest writer Chris Avellone.
Note that if you own the Steam version of FTL it should automatically update the game to the newest version, v1.5.4. If you instead own a DRM-Free version of FTL, you need to re-download the game from the original location and then re-install it.
In related news, FTL has also been released on iPad. It is the complete game (same as PC) and includes the new AE content.