New Internet consumer protection tool--SiteAdvisor.com

I've been using the Firefox plugin from SiteAdvisor.com for a few days, and I think it's a great idea. They've searched the web, downloaded content, and submitted unique email addresses on signup forms everywhere they find them, to see what happens. They then rate each site for malicious content and the extent to which it generates spam in response to a signup. This database is then used by their browser plugin to display icons next to Google and Yahoo search results indicating whether that site is green, yellow, or red regarding the type of content downloaded, the amount of email you can expect to receive from signing up at the site, and whether it links to other sites that are problematic.

Their privacy policy is good--they don't keep a record of who goes to what site. One feature I'd like to see them add is the ability to not make queries for certain domains (such as Intranet web pages--their current design allows them to map out internal corporate web structures which they should not be able to get).

Their advisory board includes Avi Rubin, a well-known security researcher at Johns Hopkins University (and formerly at AT&T) who has done significant work on e-voting security, and Ben Edelman, formerly of Harvard Law School's Berkman Center for Internet & Society, who is well-known for his research on Internet subjects such as domain name usage and China's web filtering, as well as his lawsuit against web filtering company N2H2 to defend his right to research its blocking list.

SiteAdvisor has a blog, too (though as of this moment it doesn't have a valid RSS feed, according to Thunderbird).