This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Yes, Liferay portal does as follows (abstracted from chapter 12)
Integrating with SharePoint
Liferay portal implements the SharePoint protocol, which allows saving documents
to Liferay portal as if it were a SharePoint server. In portal.properties under the
/portal/portal-impl/src folder, you will find the following configuration: