If you haven’t already signed up for Google voice, I highly recommend you do so.
What does it do? In a nutshell, you get a new phone number which you can then configure to call as many phone numbers as you wish at the same time. Get a new cell phone, no problem, just drop the old number in the configuration and add the new number.
If you missed to call, then the reall cool feature kicks in. You can have your voicemails transcribed and sent to your cell phone as a text message, or to your email. I do both. What a great resource this is, when you are in a meeting, and you can quickly check the text of the message.
oh, and you get a cool wigdet like this: