Modern times call for modern rules

I just love this article: The A-Z of modern etiquette. Some words of wisdom for the digital age. Samples:

• There is nothing more irritating in modern life than the message "sent via Blackberry". Think: why would anyone want to know that?
• ...don't fall into the trap of thinking an iPod is your property in any traditional sense. Instead, think of it as a loan from Apple, to be traded in for the newest model as soon as its built-in obsolescence kicks in, several days after the warrantee expires.
• Upon receipt of an email virus: never "reply to all" to point out the fact.