YunkPunk

Hi. I've been lurking for a while, but this is my first post. I've wanted this phone for ages, and this deal looks too good to pass up. My problem is that I already am on Cingular (but I've already fulfilled my contract obligation.) I want to keep Cingular and upgrade to this phone, not get a whole new account / number. Is there any way I can do this and get this phone for this price? Any guidance will be appreciated. Thanks!