Internet Answering machines
If you have only one phone line but love to surf the web, you might miss and important call. The phone company has an inexpensive service called Busy call forwarding. If your line is busy, the call is redirected to one of these companies. They answer with a message aying that you are online- leave a message. While you are on line, the message appears and plays. It's your option to get off line or just call back later. Very slick.
Pagoo Pagoo puts a little message on your screen (written or audible) that says you have a call. You can even have a message go to the caller that says you are online and they can leave you a message.One month free trial.
Callwave.com Same idea as Pagoo but fee. You "pay" by havin a little box remaining on top of your screen with ads. Free, fast download.