On friday I've gone to visit the local offices of OSIsoft in Philadelphia.
I've seen http://www.osisoft.com/Products/PI%20System/ which a platform which leverages MOSS/WSS to create portal application which integrates data and information from L1, L2, L3
Interesting platform. Todays we achieve the same results in terms of application features (from the user perspective) but we deliver value through a custom project. We'll evaluate if using OSIsoft platform we could increase out effectiveness.