Here are the PSI logo submissions thus far:

 

Jon Linker:

 

 

 

 

 

 

Slava Titov

 

 

 

SOFTWARE: AFPL Ghostscript 8.51 DATE: 2008:11:24 12:50:08

Colin Law

 

AppleMark

 

 

 

AppleMark

 

 

 

Zoran Mikic:

 

 

 

Michael Choy: