[lordrainkm]

You can do this free with Google Voice (formerly Grand Central). The way it works is you have a new phone number which you give out instead of your cell phone. If someone calls it, it will ring on the phone(s) you choose, if no one answers, there's a voicemail system with transcription. It has a ton of other useful features too. The only problem is you have to tell people to use a different phone number.