Rodent Regatta

WE NEED A SOLID REVIEW ON SPAM PREVENTION
Why? Because of this

• Yesterday, Dave mentioned (see several links) a product called SpamAssassin
  
• On July 11, Walter Mossberg provided information about ChoiceMail
  
• Joe Jenett mentioned SpamNet back in June; he also commented here

I noted that SpamNet is free and ChoiceMail’s introductory price is $29.95. SpamAssassin seems to be free, but possibly focused in the Unix world, though derivatives of it target Windows users.
So much for price – which one works best?