Ummm... maybe something along the lines of "It's not a real (adventuring) party until an adventurer dies."
Or, just going off the blurb (unfortunately, I too haven't played the game), maybe "End Cubic oppression, join the SCU!"
"If you were a tunnelling horror, you'd be home by now."
"Torture & Reclamation: You don't have to be a sadist to work here, but it helps."
"For your future trapmaking needs, choose Kobold labour."
"Remember, secret doors and passages are for staff only! Absolutely no telling adventurers about them. We already have enough problems with Elves stumbling in."
Yeah, I know they're terrible, but hopefully one or two will give somebody else a sliver of inspiration.