Double Opt-in in the Wild

I signed up for electronic billing statements from Verizon Wireless this morning, and was pleasantly surprised to find that they use a confirmed opt-in (double opt-in) process that requires that you validate your email address before you can receive your billing statements via email. As I am sure it is very important to Verizon Wireless that these messages always get delivered, it's good to see that they're taking the care to validate the addresses to ensure that they're truly valid, not invalid or spamtrap addresses.