From the website:
http://www.jwz.org/webcollage/
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This is what the Internet looks like.
WebCollage is a program that creates collages out of random images found on the Web. More images are being added to the collage about once a minute, so this page will reload itself periodically. Clicking on one of the images in the collage will take you to the page on which it was found.
It finds the images by feeding random words into various search engines, and pulling images (or sections of images) out of the pages returned.
There are currently two versions of this web page: one that searches the entire web, and one that searches LiveJournal only.
WebCollage also works as a screen saver, for those of you using Unix: it is included with the XScreenSaver package, and here.
The WebCollage screensaver can also be used in conjunction with DriftNet (the Unix version of EtherPEG) to snoop images from traffic on your local subnet: your screen saver can display a collage of the images your coworkers are looking at!
If you enjoy this, you might also enjoy DadaDodo.
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Frankly, this seems very innapropiate in a distro with a general purpose audiance. And you should alert your managers as this could be the cause of lawsuits and other troubles. Sex discrimination and that sort of thing. probably your co-worker is unaware of the porno pics.