Just for fun, I made this the only image in my screensaver folder on my mac at work. I unclicked "crop slides to fit on screen" under screensaver options to get the effect I wanted.
This is an old PLT logo, previously converted by me to svg in inkscape, and now converted to GIF at a fairly high resolution (.svg -
.eps (by inkscape) -> .gif (by Preview)). Robby Findler has a
whole progression of PLT logos on his web site at
http://people.cs.uchicago.edu/~robby/logos/
This particular logo seems to have been disavowed by the PLT group in an attempt to go mainstream (good luck with that!), so I don't feel so bad using it as a logo for Scheme itself.
So Steve Jobs like to fly the skull-and-crossbones; we can turn a dead-head into a lambda-head!
Brad