This week I finally pulled the plug on my Verizon account and got everything ported over to the iPhone. All is well and good, except for this growing stack of unused mobile devices on my desk. Fortunately, there are a number of options for responsible reuse or recycling of old phones, outlined in detail at exPhone.

The average American mobile user owns three or more phones, and most of these end up in landfills. So if you have any exPhones that have been put to pasture, be sure to wipe out all your data, then donate the device to a good cause or simply recycle it.

Apple offers a simple service — they send you an envelope, you send back your phones (or iPods!), and they take care of the recycling for you. (Or maybe Steve Jobs is collecting old parts to build a giant robot.)

In other mobile device news: GeoHot hacked the iPhone, de-coupled it from the AT&T network, and then traded it for a Nissan 350z. Meanwhile, Engadget and Crunchgear have more rumors about the GooglePhone.