UPDATE: NO MORE GRANDCENTRAL INVITATIONS ARE AVAILABLE. I’M ALL OUT, SORRY.

Have you heard about GrandCentral yet? Google just acquired the company, and for now at least, it is free. I have to say that this is the coolest use of technology I’ve seen in a long, long time. Maybe because I’ve moved a lot in my life, but dealing with phone number changes is a real drag for me. GrandCentral eliminates that problem for me – forever. The premise behind GrandCentral is that you can have a phone number tied just to you – forever. It’s not tied to a location or a phone – it is tied to you. No matter how many phone numbers you have – home, cell, work – you can have one GrandCentral number that redirects to any of them. No matter how many times you move, or how many times you change phone numbers, your one GrandCentral number can stay with you forever, and can be redirected to any new phone number you wish.

You can set it up so that different groups of people will be redirected to different phones. Different groups can get different ring tones or different voice mail messages. There are simply tons of features available. Here are some screenshots that list various features.