Google is now offering bloggers to signup directly for Beta “Grand Central” . According to google, its a fress service by which you can receive phone calls and post voicemails right on your blog. Though GrandCentral is currently in a private beta test, bloggers can skip the wait and get a free account immediately.
So it is Blogger and Grand Central integration, to explain in other words, you can receive phone call via internet and no will know your number. People can leave voice comments on your blog. Like a VoiceMail service through blogger via Grand Central.
Also, signup is only available to Bloggers of USA, so I was not able to evaluate it. Though google said that they are going to spread in other countries too. I know that is going to take time. But atleast another exciting stuff added in Blogger bag.