Microsoft acquired Whale Communications in 2006. Its SLL-based VPN appliance became Intelligent Application Gateway (IAG) 2007. Wikipedia gives a good overview of this product. Basically, it is a Web application firewall and endpoint security management solution offering more sophisticated features than the ISA Server. According to Microsoft, the new features of IAG 2007 SP2 are simplified deployment, interoperability for environments not running Windows, enhanced application support, improved user experience, and improved performance. You can download IAG 2007 SP2 or try it in a virtual machine.