Grandcentral is my second favorite product from Google (Gmail is first).
Ever try to order something for delivery only to have the restaurant deny you because you have a long-distance cell phone as your only number? I have. It happened last night when I tried to order Pizza Hut (stuffed-crust pizza is delicious). So, I fired up my gmail to look up my Grandcentral number. It is a service from Google that gives you a phone number in an area you choose. You can then redirect calls to that number to any other number (I redirect to my cell phone). It also has a bunch of other features like voicemail that you can listen to online, different ringers (although I hate Verizon Ringback), switching phones during the call, and recording the call.
Know who’s calling and screen unknown callers
Hear why someone is calling before taking the call
Record calls on the fly and access recordings online
Unwanted callers won’t be able to reach you anymore
Receive voicemail notifications via email or SMS
Ring Different Phones
One number that rings different phones based on who’s calling
Personalize your voicemail greetings by caller or group
Go beyond the ring and choose ringback tones for your callers
Let people call you from a web page without showing your number
Switch phones in the middle of a call
Call from your addressbook and save your typing
Visual voicemail for your mobile phone