Amazon has launched Amazon Wireless beta, an online storefront where you can purchase voice and data plans from AT&T and Verizon, with T-Mobile and Sprint also coming soon. Normally, we wouldn’t give something like this a second look, but it’s Amazon, and they will be pointing consumers to this wireless portal from within the main Amazon site. The nice thing about Amazon Wireless is that you can compare offerings from the carriers in one easy-to-use spot, rather than visiting 2-4 different sites. Even better, all that mail-in rebate stuff goes out the window if you end up buying your mobile phone and plan on Amazon Wireless - all discounts are instant. Amazon Wireless beta is open now, and currently has over 130 phones up for sale.