If this is what it is cracked up to be, I’m signing up.

Many people have 3 phone numbers: a work number, a home number, and a cell phone number.  How can your friends and family know how (and when) to reach you?

Wouldn’t it be great if you could give your contacts ONE phone number, and their calls would reach you no matter where you were?

That’s the idea behind Grandcentral, a web application that lets YOU decide where to take your calls.

Check it out.

Here’s some interesting features:

(1)  YOU get to pick your Grandcentral number.

(2)  You can switch phones right in the middle of a conversation.  That is, if you are at home talking on your cell, you can pick up the conversation on your home phone without ending the call.

(3)  All your voicemail goes into one centralized location.  You can check your voicemail from (or for) any of your phones.  You can even check your voicemail through the Internet.

(4)  Caller ID, all the time.  You can customize your Grandcentral service so that certain callers automatically go into voicemail, while others find you.

(5)  You can have customized voicemail greetings for whoever calls.

(6)  It’s FREE (for 3 phones or less).