Please add Yap to your list of PDF readers.
Yap is a GNUstep PostScript/PDF previewer and front end to the a2ps text formatting tool. http://www.gnustep.it/marko/GPSText/index.html
Please would you release the PDF reader graphics and buttons under free software licences? In particular, a high-resolution copy of the f and the green square would be very useful.
Thanks so much for doing this. I'll link it from future sites.
Thanks,