From the announcement:
Inspired by the dramatic space battles of the original Star Wars trilogy, X-Wing™ allows players to wage fast-paced, squad-based dogfights between Rebel and Imperial starfighters. Flexible squad-building rules allow tremendous potential for customization; even with just a few ships, you hold a wide range of options with the game’s many pilots and upgrades.
Now, your X-Wing experience becomes even more personalized and customizable with the release of X-Wing Mission Control!
X-Wing Mission Control is a free online resource that allows you to design and share new X-Wing missions.