Google’s free phone service Grand central,though in a private beta testing stage ,is available for bloggers .Bloggers just need to sign up and get the code for showing the web call button on your blog.Through this service readers can easily call your phone number or leave a voice mail message without ever seeing your phone number.You can even post the voice mail messages on your blog for your visitors to here. It’s available at present for U.S residents only and Google is planning to expand it to other countries .When I tried to sign up I got this message .So U.S bloggers enjoy .
You can read all the news here