If you're a fan of White Star, you should pick up the White Star Companion. The book is loaded with new options and rules for White Star. We get 8 new classes, (optional) rules for multiclassing, new vehicles (space and land), skills and serials (background info), aliens, equipment, random encounters, and a new system (adjacent to the one described in the core book). This pdf is totally worth the 6.99 asking price. If you buy the pdf, you'll also receive a discount coupon for the print version when it drops.
Oh yeah and did I mention you can play as a Transformer... I'm sorry a novomachina?