Top of my head, and thinking solely of utility, not novelty:
Get your consortium rep up and start churning out Elemental Seaforium Charges. All mats available from Vendors. Used by other lazy engineers as a component in the Flying Mount. If they don't sell then you are now a very expensive rogue.
2 Khorium Power Cores for use in your Epic Roflcopter.
Take your Roflcopter up to Blades Edge Mountains and drop the Repairbot schematics from the Analysts (? - The short demon engineers) from the place with the shards that light up ( Just to the north of the Skybase, before you enter the forgecamp proper) If you kill more than 10 and it doesn't drop, then you've chosen the wrong mobs. Churn out the robots for your guild runs. They'll love you for it.