I guess PBX and Skype got your attention. Well, in its true sense it is not a PBX, as it does not support any telephony interfaces and protocols. It is primarily a tool to manage multiple Skype users through a common web interface, using Skype APIs, thus creating a PBX like solution.
o Manage User Accounts
o Manage Contact List
o Manage User Classes
- End User
o Check User's availability Status
o Make/Receive Calls
o Leave/Check Voice Mail
It is based on open architecture, thus making it easy to integrate with any other applications like Intranet Portals, CRMs, Group Collaboration softwares etc.
For further details checkout http://skypeji.sourceforge.net/
First alpha release is scheduled for July 13th, 2005