This service was supposed to take care of the issue of several phone number changes. By using Grand Central – you could use one number for life and forward calls from that number to your home, cell phone, or any other phone depending on caller, time of day, etc.
This also means – you can have someone call your Grand Central phone number and it could potentially ring all your other lines until you pick up (great for traveling or people who always use the excuse “you should have called my cell phone instead of my home phone, etc”).
We both signed up for accounts – but soon after I ended up not using it because of some reason or another. Almost a year and a half ago – Google bought it and finally – has released it under the name “Google Voice“. I look forward to trying this out because of the added features (voicemail transcription, conference calling, new UI, etc) and increased reliability (and coolness).
*This also takes care of my never remembering what phone number I have registered for my Dominick’s card 😉