The Modern Language Association has launched the Humanities Commons.
Here's an excerpt from the website:
Humanities Commons is a trusted, nonprofit network where humanities scholars can create a professional profile, discuss common interests, develop new publications, and share their work. The Humanities Commons network is open to anyone.
Humanities Commons is a project of the office of scholarly communication at the Modern Language Association. Its development was generously funded by a grant from the Andrew W. Mellon Foundation. Humanities Commons is based on the open-source Commons-in-a-Box project of the City University of New York and the CUNY Graduate Center and is an expansion of the MLA's MLA Commons, which launched in January 2013.