Some past projects: 

OSGi Services Architecture

• Java components for flexible residential service gateways
• Automation system independent application interface
• Base level EIB service implementation for Linux

Jini/UPnP

• Spontaneous net-working for automation devices
• Bi-directional proxy based approach
• Web-based access
• Integration of EIB and LonWorks
• Java UPnP SDK implementation

See also: http://www.auto.tuwien.ac.at/Projects/Jini

Group Object Broker System

• Integration of EIB/KNX with IP networks

Further links

• KNX Association  
• KNX Developer's homepage
• List of online forums devoted to EIB