I thought SiteInspector also took into account whether there was malware reported on that site.
SiteInspector free page scan provides scanning of the web-pages or URLs without, but not a scanning of sites with the depth.
So, when you start free scanning of "http://antispyware.com
", SI will scan only index page of this site, but not all pages of the site.
But here: http://siteinspector.comodo.com/public/recent_detections
you may find all HighRisk/Suspicious sites with a risk descriptions and the links to all found unsafe pages on the site.
Please offer comments on the interface, we will improve it.