While the use of Web 2.0 products is exploding, its full impact on enterprise security is still not well understood. IT professionals struggle to adopt reasonable policy controls to keep their networks safe from external threats. As new forms of dynamic content such as iGoogle, video sharing sites, blogs, etc. stream into enterprise networks, administrators are looking for solutions to block dangerous or inappropriate content, yet allow employees reasonable and necessary Web 2.0 access to get their jobs done.