Quite a while ago I blogged about the SharePoint External Collaboration Toolkit. I just wanted to make you aware that this toolkit is now moved to Codeplex and can be found here: http://cks.codeplex.com/
About the author
Roger Halbheer is an Executive Security Advisor at Microsoft in EMEA acting as a trusted advisor to CxO. Before that he was a Managing Director at Accenture's Financial Services. Before joining Accenture, he was the Chief Security Officer of Swisscom (Switzerland's largest telecom provider) and the global Chief Security Advisor for Microsoft.