Here's the official scoop on the Microsoft Anti-Spyware beta classification of Claria's software - http://www.microsoft.com/athome/security/spyware/software/claria_letter.mspx.  The official "Analysis Approach and Catagories" are outlined here http://www.microsoft.com/athome/security/spyware/software/isv/analysis.mspx.

Definitely check out the beta and provide feedback - http://www.microsoft.com/athome/security/spyware/software/default.mspx