You can nominate yourself for the ACTv5 beta at http://connect.microsoft.com - select the "Available Programs" link and then look for "Microsoft Application Compatibility Toolkit Version 5.0 Beta" - more below:

"Some key features that will be included in ACT 5.0 beta:

√        An inventory collector that will detect applications installed on a computer

√        Compatibility evaluators that will detect potential application issues that are –

*      Related to User Account Control on Windows Vista

*      Related to Internet Explorer 7

*      Correlated to specific Windows/security updates

√        A new user interface that provides the capability to centrally manage the configuration and scheduling of compatibility evaluators

√        Extensive reporting functionality that enables viewing and pivoting of reports based on updates, applications, computers, and websites

√        Data organizing capabilities that allow –

*      Creation of custom categories

*      Assigning of priorities and deployment status for applications

*      Management capabilities of issues and solutions

*      Removal of unwanted applications from reports

√        A significantly improved tasked based online help system

√        A Microsoft Compatibility Exchange web service that allows –

*      IT Pros to share application compatibility data with each other

*      Microsoft to share Windows Vista testing data"