"Google has released a new application for Mac users called "Vocito" that puts GrandCentral calling right on your desktop. It integrates with OS X's address book, Automater app, and third-party applications like Blacktree's QuickSilver to let you start a GrandCentral-powered call no matter what you're doing on your machine."

http://news.cnet.com/8301-17939_109-10102442-2.html

Finally! Some development from grandcentral

It's time to test some day!