cdrw is a recognised term but is only a form derived from the CD so I don't see great value in most extensions, the .com isn't used and others are parked (probably only source of revenue). The .in extension obviously refers to India, although some have suggested that, like .ws is used for "website", .in could be used for "internet" - only time will tell if that proves to be so and if it is accepted by the general public. Even if it is I still do not see this particular name to be of any real value.