You guys do great work - we were just talking about you at the lean startup event last night with a team from Holland that's in town to interview at YC. I think there was some kind of friend-of-a-friend-married-a-sister type of connection :)
As a designer, I loved visiting Amsterdam during my honeymoon last year - I felt like I was drowning in a sea of Helvetica. The ugliness of American road signs was an extremely heated topic last night.
I think they'd run out of business cards, if I remember correctly. And we were getting kind of drunk by then so I don't remember their app either :) sorry!