La la la... *bored, picks nose while browsing this thread with a Mac*
Sorry, just had to throw in the usual OS-war stuff.
I think the reason why there are more viruses etc. for Windows (or IE) is not only because it is very popular, or because the hackers think that Microsoft s*cks. I simply guess it is quite frustrating for a hacker trying to write a trojan which upon installation automatically pops up a system window asking the user for the machine's admin password to install "itself unnoticed". These trojans would probably have limited success in spreading worldwide within a few hours or days.