Ooma TELO for $179
JR.com has the new Ooma Telo VoIP - Free Home Phone Service with Unlimited U.S. Calling, Caller-ID, Call-Waiting, 911 & Voicemail with No Monthly Fee for $179 with free shipping. Works with any corded or cordless phone; easy installation with no computer required.
Something I would like to note is very soon Ooma is adding google voice support which will be a great new feature for it and bring about many many reasons to use Ooma over using a standard phone line.