If you are really looking for the best deals in residential VOIP services, look at providers with annual subscription rates. Most VOIP providers only offer monthly plans. Vonage for example is currently offering $24.99 per month for its basic unlimited service (free unlimited calling to anywhere in NA and Europe).
But as a way to reward and attract customers, VOIP companies are adopting what cell phone companies have been doing for years: offering the latest and greatest gear for free in return for long term committment.
SunRocket markets a similar package at $24.95 per month or an annual subscription at $199 per year. That works out to about $17 a month. So if you can handle prepaying for your service by the year instead of by the month, then an annual package is a good idea.
Packet8 has also recently adopted the annual package deal. For a flat rate of $199 per year, you get get unlimited calling within North Americal, calling features like voicemail and call waiting and a 100% discount on a Packet-8 enabled UIP1868P 5.8-GHz digital cordless phone system, which can be extended to work with multiple cordless handsets.