Amazon has the OBi100 VoIP Telephone Adapter and Voice Service Bridge for just $39.99 with free shipping, after coupon.
IMPORTANT: You must use coupon code OBIDEAL4 at checkout.
When paired with your free Google Voice Account, the OBi100 allows you to make and receive free calls at home via your normal telephone handset. Cancel your home phone service and still maintain a home phone line.
he OBi100 has one phone port. It supports Google Voice, SIP & OBiTALK VoIP services. Use the OBi100 when you do not need an analog line to a traditional telephone network or service. The OBi100 is perfect for customers who do not have a traditional telco phone service and want the savings and simplicity of using a VoIP service for all their calls.