This is a service offered (and, of course) recommended by Mailboxes Etc. for one. I don't know about others. They make some more money, but I believe it is a valid precaution and in their best interest (damage claims) and yours (disappointment).
Double boxing?
When shipping gear I see alot about the recommended practice of double boxing. Is this a service offered by the shipping companies or just a practiced invented by my fellow audio ethusiasts?