Any business that has a corporate VoIP system can now use Skype's SIP trunking service as a way to cut the cost of corporate phone bills. The Skype for SIP program goes into general beta testing today after being in limited beta since spring.

With the service customers can: enable click-to-call buttons on Web sites; receive inbound calls from Skype endpoints for no extra cost; set up direct-inward-dialing Skype phone numbers that reach desktops through IP PBXs; and, make outbound calls through IP PBXs via supplemental Skype Out service.

Customers must have a broadband Internet connection and configure the SIP settings on their IP PBXs so they can talk to SIP gear in Skype's network.

More: http://www.macworld.com/article/144694/