Sebastian Onufszak is a German-Polish illustrator, designer and director with an impressive list of professional clients.
Here are some awesome pieces of his that I admire for their jaw dropping intricacies:
Piece from The Human Zoociety (Personal experiments/collage)
Piece from Fragile (Illustration/typography)
Piece from Gods of LSD (anti-drug campaign)
Check out more of his amazing pieces at: http://www.onufszak.com/
Hope this post inspired you in your Printrunner print business cards