20,000 Zombie PCs -- $3000
Saint Aardvark writes "From F-Secure blog comes these links to two USA Today articles on spamming. The first gives an example of how a grandmother ended up becoming a security expert after Comcast cut her connection for spamming. The second quotes spammers advertising networks of Zombie PCs for sale. The price? $3000 for 20,000 machines."
Actually, the problem is far worse than this.
With the ability to register unicode domain names, you may indeed see www.citibank.com and have no idea that the "a" is from the russian alphabet and therefore points to a different server and IP, even though visually, right down to the pixel, they are identical.
All browsers should show warnings for any domain containing characters from multiple languages, or not permit them at all. I can think of no legitimate use for them.