ETA: FangGrip apparently hit Post seconds before I did.
They aren't cards, but Oggdude's character generator also includes GM tools. One of those tools not only prints out adversaries, but you can print out an entire encounter such as two groups of Stormtroopers (4 each) plus a Stormtrooper Sergeant.
But, yes I was a lover of the cards that FFG put out for Warhammer.
I think the two things that could benefit from "cards" for this system are Gear and Adversaries myself. Those are things that you could need on the fly when the GM suddenly needs a new bad guy to throw at the group or a PC grabs that Fusion Lantern off of a downed foe. You thus wouldn't need to stop and crack the book open for details. I never understood needing quick cards for things such as Talents since those could be listed on the character sheet and you won't be adding them suddenly on the fly, only at big pauses or breaks between adventures.
Edited by Sturn, 28 January 2014 - 12:51 PM.