Last October I started using OOMA VOIP and I have to say that it has been great.
In 6 months of using Voice over IP I have been very pleased with the service and functionality. And now they are offering a second number free. I can not find a reason to get a land line, or even try another VOIP plan since OOMA is free with their equipment and it allows me to use standard telephones instead of proprietary IP phones or headsets. I may even step up to their new Premier service for only $12.95, but for now what I have works great.
With my recent move there was nothing more for me to do than setup my VOIP hub when the broadband was installed. I really do not miss dealing with the phone company at all. I use inexpensive cordless phones with the system and the range is excellent throughout the house and deck.
OOMA is Available from Amazon (yes, that is an affiliate link!)
You can read more about OOMA at their Blog.