Any other companies like Consumer Cellular?

Hello. I was wondering if there were any other companies out there like
Consumer Cellular that resell either Cingular TDMA or Verizon's
wireless services and allow you to use the current phone you have
(obviously if its one thats compatible with that carrier). I've tried
looking around online, but I haven't been very sucessful.

Thanks for any help,
Andy

(PS-Sorry if theres multiple posts of this topic without a body, google
groups was giving me trouble)