http://www.delcam.com/news/press_article.asp?releaseId=362

Delcam offering free cad software
Havn`t read the article properly so don`t
know if theres any catch

Reading that I think it's more a CAD viewer with a few bits bolted on rather than a fully functioning Cad package. For example it says you can only save the changes localy rather than to the imported master model.