Forefront TMG 2010 TechNet documentation is now live with Forefront TMG Release to Web content. Forefront TMG is a secure Web gateway that helps protect employees from Web-based threats. It also delivers simple, unified perimeter security with integrated firewall, VPN, intrusion prevention, malware inspection and URL filtering. This documentation is designed to assist you in understanding Forefront TMG and learning how to deploy and operate the software. It also provides reference materials and troubleshooting tips.
Read more at source: http://technet.microsoft.com/en-us/library/ee207140.aspx