Silicon Valley startup Ooma will begin selling their $399 broadband voice box strarting tomorrow, according to a press release. As we mentioned last July, the $399 device plugs into your broadband connection and uses a peer-to-peer architecture to dodge termination fees and offer free voice calls. Users can buy $39 "Scout" devices that extend the system to each phone jack.

While touted as a revolutionary product over the summer, the service isn't entirely unlike the $99 PhoneGnome, though it does come with the PR benefit of being co-founded by actor Aston Kutcher. Instead of blowing their $27 million in VC money on TV ads, the company is taking the viral approach and circulating some YouTube promotional spots tomorrow, which should have the startup blogs in a frothy lather for much of Wednesday.

Given that the service is using users as hubs scattered around the country to dodge the PSTN where possible, the product's success depends on how many users sign up for service. The beta saw some 750 customers, which we assume is in addition to the 1,500 free devices the company circulated over the summer. There's more detail on the service over at the Ooma website.