Does nopCommerce have Authorize.Net SIM support?

Is it possible to make the button "Pay by credit Card" to appear in Shopping Cart page (near the Paypal Express Checkout button like on happyslimmer.com) so that click on "Pay by Credit Card" will lead streight to the Authorize.Net hosted form.

So the idea is to do not accept any info on my site - and transfer to Authorize.Net hosted form and then accespt from the Authorize.Net the Billing and Shipping addresses (but definitely not Credit Card number).

Basically I want to implement it in the way how I implemented it in my own home grown shopping cart on HappySlimmer.com

But I want better shopping cart with many features like yours. Want to upgrade still keeping this beautiful functionality when you just click "Pay by Credit Card" right in shopping cart and go streight to Authorize.Net hosted form.

If this is not implemented yet then how difficult do you think to develop such plugin or module?