This most excellent collection of Star Trek business cards includes Spock, Kirk, and other universally familiar names — but I was delighted to find less frequently seen characters like Harcourt Mudd, too. "Mudd's Women" is one of my all-time favorite episodes.
The calling card for Kang, Klingon High Commander, reads, "WARS ARRANGED / PLANETS CONQUERED / NO WAR TOO SMALL."
Link to business card images. (Thanks, Christophe)
Update: Boing Boing reader Nick Younes says, "You may now bid for them on eBay: Link."
