The last time Google visited this site was on 2009-06-17
If you are certain that your site is clean and secure, you should “Request a Review” through your Google Webmaster Tools account. Your site must be added and ownership verified before you will be able to see the malware warning and get to the “Request a Review” link.
Google Webmaster Tools
Google Malware FAQ – Request a Review
If your site is clean, the message “This site may harm your computer” should disappear from your search results within about 24 hours. When that message is removed, the “Reported Attack Site” message should also be removed from the browser warning.
The last time Google visited this site was on 2009-06-29 and it is no longer listed as listed as suspicious.
Resources you can use to evaluate your site manually if you need to:
Tips for Cleaning & Securing your Website
How to remove the ‘This site may harm your computer’
Google MalwareFAQ and screenshot for ‘Request a Review’