Eat your own dogfood. IBM released today Lotus Connections for Business Partners. Its not just a demo site. It will be used for collaborating with the Business Partner Community.
Unfortunatly I will not be able to use it right from the start. The site on Firefox on Linux looks realy bad. And Internet Explorer on Windows makes the site unreadable. Hopefully they fix this fast. I had exactly the same problems while using it on Lotusphere 2007.