Virtual Phone Numbers
It is important to separate work from home life. Do you want a cell phone number that you can give to clients that only rings to your cell during extended business hours (e.g. not at two in the morning or on Sundays)? Several companies can provide you with a second number which you can give out in place of your mobile number. Caution: these numbers do not receive text messages.
Grand Central
Grand Central from Google is currently free. They provide a service with a virtual number which will ring to any US number of your choosing. It will pass on the caller’s phone number as part of the caller-id information, announce the call, and give you an opportunity to accept or refuse the call. Voicemails are e-mailed to your e-mail account.
Accessline
Accessline is the grandfather of personal numbers. They support of all of the above features, plus VOIP, and a virtual calling card so that return calls appear to come from the Accessline number rather than your true mobile phone number. Accessline supports multiple ring options, caller announcement features, If you are a Costco number, join through Costco.com. There is a substantial discount. They also offer Virtual PBX systems for small and medium size businesses.
Innoport
Innoport offers similar services starting at $9.99 a month. I do not know very much about this company.