In the November 2005 issue of PC World magazine, 11 different products are evaluated. Webroot Spysweeper continues to score near the top in all evaluations. The MSAS beta release also had a positive review and scored as one of the best free products. It's always best to look at more than one evaluation, as the review team can rank categories differently.
PC World - Evaluation of 11 Anti-Spyware Products
PC World - Evaluation of 11 Anti-Spyware Product Grid