I uploaded it here (NO LONGER WORKING)
http://www.upload2.net/download2/WTWZaaHHRZFb1Ax/ClamAVportable.zip.html
NEW DOWNLOAD LINK (NO LONGER WORKING)
http://rapidshare.de/files/11864445/ClamAVportable.zip.html
THIS IS GPL OPEN SOURCE SOFTWARE AND IS PERFECTLY OK AND LEGAL.
It would be a great addition to your site
download and test it 1st (it all works, personally tested it)
i also added a launcher program to make it easier.
enjoy,