Garry Tan is a partner and a rockstar. He's given a plenty of amazing pointers and w/o him (and other partners) we would've gotten plenty of other things wrong.
That said, Garry can guide us. His job isn't do design for us... that onus is still no us! Hence, please blame us for poor design.;-)
http://mashable.com/2011/01/14/posterous-founder-leaves-star...