Make Your Own Skype Phone Adapter

If you've not already wired up your pre-existing POTS system to your VOIP system, you may be interested in this DIY project that walks you through the creation of a telephone-to-VOIP adapter for your wired or cordless phones. From the site:

Just imagine: You can walk with your wireless phone chatting with Skype friends for free, you can make free call to your mom if she is connected to the Internet...Skype wireless phones are expensive, VoIP adapters cost ~$60, but you can make it for free if your have details.. from old TV, Radio or other electronics.