The Nomorobo anti-telemarketer system, as illustrated here, is now, I am told, online and running. Per their announcement email:
Initially, Nomorobo supports AT&T U-Verse, Cablevision Optimum, SureWest, Verizon FiOS, and Vonage. But don’t worry if you don’t see your carrier listed – new carriers are being added all the time. Sign up [http://www.nomorobo.com/signup] and you’ll receive an alert when your carrier supports Nomorobo.
A quick, one-time setup activates Nomorobo on your current phone line. Caller ID isn’t required. School closings, doctor’s appointment and prescription reminders, weather advisories and other legal robocalls aren’t blocked.
Telephone Science Corporation
5507-10 Nesconset Hwy #201
Mt Sinai, NY 11766
I am not rushing to sign up just yet: after all, I have had a working call screener for many years, and I’d like to see some real-world results before I do anything.