Skype chose Tellme Networks, Voxpilot and Voxeo to enable voice content services on Skype network.
You can start making money right now by developing a good voice application (eg. Using Tellme Studio). After development you need to submit-it to TellMe and if it is accept it they’ll inform Skype to list it in their voice services directory.
Acording to http://www.tellmeskype.com/, you as a developer define per minute charge for the voice service. The call revenue generated is split three ways:
-Skype keeps 30% for promoting your service and connecting callers.
-Tellme keeps 42% for enabling your service.
-You receive the remainder -- 28% of the per minute charge.
You can download a guide on how to build Skype voice services from: http://www.tellmeskype.com/SkypeTellmeVXML2006-02-17.pdf