If you have the N900, just download the image for free. Yes $900 is too much, but so sis $45 for a usb to ethernet or a 16gb sd card

http://www.pwnieexpress.com/accessories.html

it's relatively priced for consumers who want 'working out of the box' which is very strange, considering pentesting is all about tweaking things yourself.

Well, in this stragne dichotomy they exist, for the 'script kiddies' i guess