I tried to check pages with web-sniffer.net, but they time out before I can get any results.
Have you checked out any of the resources to guide you in your evaluation?
Malware & Hacked Sites FAQ - Request a Reviewhttp://sites.google.com/site/webmasterhelpforum/en/faq-malware-and-hacked-sites
Tips for Cleaning & Securing your Website - StopBadware.orghttp://www.stopbadware.org/home/security
How to remove the "This site may harm your computer"http://25yearsofprogramming.com/blog/20071223.htm