I'm a bona fide ray-gun sucker, and I'm in mad hot love with this raygun pen, as covered by our John at Boing Boing Gadgets:
An absolutely gorgeous ray gun pen by the appropriately named ACME Writing Tools, available mid-February for $130. The barrel separates from the brightly colored, Marvin Martian base as a retractable roller ball. I only wish the handle / stand were less cartoonishly abstract.