Ringback Tones discontinued

Under the AT&T ringback tones page it is showing the service is to be discontinued at the end of the year:

http://rbt.att.com/faq

Generally I find the service annoying when others use it but there are a few specific cases where it can be helpful. In my case if you're on-call for your job you want a clear indicator for the people reaching out to you that they are calling a personal number after-hours which should be for emergencies only. AT&T has no mechansim to record your own message to these Ringback tones are the next best thing to let your callers know they're dialing a cell number. 

There are workarounds out there such as tunneling through Google voice but keeping it all under AT&T would keep things simple and easy.

Does anybody know if AT&T is rolling in a replacement service, maybe through a 3rd party provider or is this the end of AT&T offering any kind of service along these lines? Thanks.