Using my VirusTotal API i've put together a post processing script for SABnzbd. The script will perform a recursive scan and perform a search on the VirusTotal site. Again, no file content is uploaded but instead submits the cryptographic hash (SHA256) to VirusTotal. The results will be displayed on the SABnzbd interface through the "View script log" window.
The Google code project can be found here, along with the download ready to add in your script folder.