A 'Do Not Call' List for Cell Phone Users?

I received the exact email listed in this article today, and while tempted to call I was afraid it was a scam to actually "get" my cellphone number. After a quick Google search I found the above article. Looks like the call is up to you whether or not to register your cell phone (no pun intended). The claim is that the list of number will never be made to telemarketers.....what do you think?