MS's new antispam idea

http://news.bbc.co.uk/1/hi/technology/3324883.stm Ok so in summary you have to use a bit of CPU to solve a puzzle before it lets you send email. So either this doesnt work because spammers dont actually use their own PCs to send email or we are talking about a whole new mail protocol, either way I'm thinking this isnt going to work and its yet another publicity stunt. Steve