Sustainable Softworks has released Phone Amego 1.1.14 (http://www.sustworks.com/site/prod_phoneAmego_help/PhoneAmegoHelp.html), an update of the Mac OS X (10.5 and later) tool designed to make using your phone easier when you’re near your computer by providing on-screen caller ID, letting you click to dial a phone number from your Address Book or on your screen, and optionally dialing through Google Voice. This release adds Bluetooth speakerphone capability so you can answer a call from your Mac without touching your phone.
It costs US$20, though version 1.1.13 is a free update for registered users. A demo is available for download.
In addition to Mac OS X 10.5 or later Phone Amego requires: a Google Voice account or a compatible Bluetooth cell phone or a landline phone connected through a compatible USB modem and caller ID service or VoIP phone connected through a Linksys/Sipura VoIP telephone adaptor.