Criminal charges included the person who designed megaluploads logo, as well as other parts of the site.
According to paragraph 34 of the criminal indictment, "BENCKO has been the lead graphic designer of the Megaupload.com and other Mega Conspiracy websites. He has designed the Megaupload.com logos, the layouts of advertisement space, and the integration of the Flash video player.
BENCKO has requested and received at least one infringing copy of a copyrighted work as part of the Mega Conspiracy. In calendar year 2010, BENCKO received more than $1 million from the Mega Conspiracy."
IMHO that's a pretty thin claim to try and extradite someone from their home country to the US for criminal charges.
But the point of conspiracy law is that if you a role, no matter how small, you can be charged for the entire enterprise.
Website developers and graphic designers may want to be careful about who they do business with.