I read a lot about VoIP, but it's still confusing. Just what do I need to sign up for VoIP, and can I then get rid of my regular phone line?

You are not alone in your confusion. While this has been a breakout year for VoIP, most users are still unsure about how best to implement it. VoIP lets you place phone calls over your broadband Internet connection, rather than over traditional landlines. Since Internet calls are essentially free, assuming you already have broadband, you can save big bucks on long-distance service -- locally, nationally and globally. And in contrast to cell phones, typical VoIP plans require no contract and cost just $19.95 to $29.95 per month for unlimited calling in the U.S. and Canada. Those prices also include a raft of features like Caller ID and voicemail that you would pay extra for with your landline.

So just how do you do it? First, let's dispose of a couple of misconceptions. Namely, that you can immediately dispose of your landline. That's only true if you DON'T also need your landline for DSL, alarm system monitoring, or TiVo service. Emergency calling is another problem area; 911 service from VoIP providers may be limited or nonexistent, and you'll need to have electricity on in order to use VoIP equipment, unlike traditional phones. Another common misconception is that you need computer software to use VoIP. While there are plenty of computer-based VoIP services (notably Skype), companies like Vonage offer a separate box that simply sits between your Internet router and your regular phone handset, making installation a snap.

Assuming you want to go with a VoIP system, one handy tip for spreading it throughout the house is to use a cordless phone system with a single base station attached to your VoIP adapter, and then place the extra handsets in whatever rooms you like. The Vonage Help area has lots more great tips for VoIP usage.