Examine <A HREF="http://www-128.ibm.com/developerworks/lotus/library/sametime75/index.html?ca=drs-">the architectural and design changes</A> planned for IBM Lotus Sametime 7.5, including a new Connect client, a new Web conferencing UI, policies, click to call, click to chat, A/V integration, and a new SIP solution to connect to external communities, including AOL and Yahoo.