Microsoft is cooking up version 3.0 of Threat Analysis and Modeling, a Beta of which is planned for availability at the start of July, 2009. TAM is set up to enable developers to build secure apps from day one. The tool increases 
the focus on security by helping developers identify potential problems as early as the design process,  rather than letting them respond to vulnerabilities with patches once the program has been finalized. In the video embedded at the bottom you will be able to see Anil Revuru, from the Information Security Tools team, explaining TAM and talking about version 3.0.