A bit old news, but for those who haven't seen it yet

Finally, MSFT has entered into SSL VPN market with its recent acquisition of whale communications (http://www.whalecommunications.com).
This is an appliance device which runs on Windows 2003 and uses ISA server.
Whale’s product line includes two editions of its Intelligent Application Gateway product that incorporates Microsoft’s ISA Server, multiple Intelligent Application Optimizers for both Microsoft and third-party applications, and Connectivity Modules.
Intelligent Application Gateway Product Editions
•Enterprise Edition
•Express Edition
Intelligent Application Optimizers
•SharePoint Portal Application Optimizer
•Microsoft Exchange Application Optimizer
•Mobile Access Optimizer
•IBM Lotus Domino Optimizer
•IBM Lotus Domino Web Access Optimizer
•SAP Enterprise Portal Optimizer
•EMC Documentum Webtop Optimizer
Connectivity Modules
•Network Connector (for back-connect applications like VoIP)
•Client/Server Connector
•Novell Connector
More Info: http://www.microsoft.com/isaserver/whale/default.mspx