Yeah, I tried the 'filtering on oft-used words' methodology for awhile mice-elf, I was up to something on the order of a hundred filters, but I discovered that the Spammers are constantly developing ways around these filters, as your post illustrates.
Having recently switched to Outlook Express for my email client, I am now using its feature that allows me to filter on any email msgs whose sender is not in my Address Book - all such mail is moved into a separate folder I've named Check These, because occasionally I do get a legitimate msg from someone whose address is not already in my address book, such as when I do business for the first time with a web vendor and they send me a confirmation or acknowledgement, or when one of my friends changes their email address.
Somehow, having all my SPAM get put into this special folder where I expect it to be, makes it less annoying than when it used to show up in my In Box.
It's then just a brief perusal to distinguish the few legit msgs among the flood of Spam and a few clicks to delete the garbage forever.
- kbeartx
