JSTOR and Ithaka Merge have merged and they are now known as Ithaka.
Here's an excerpt from the press release:
JSTOR was founded in 1995 by The Andrew W. Mellon Foundation as a shared digital library to help academic institutions save costs associated with the storage of library materials and to vastly improve access to scholarship. Today, more than 5,200 academic institutions and 600 scholarly publishers and content owners participate in JSTOR. Ithaka was started in 2003 by Kevin Guthrie, the original founder of JSTOR, with funding from the Mellon Foundation as well as The William and Flora Hewlett Foundation and Stavros S. Niarchos Foundation. Ithaka was established to aid promising not-for-profit digital initiatives and to provide research and insight on important strategic issues facing the academic community. Ithaka has become known for its influential reports including the 2007 University Publishing in A Digital Age and the 2008 Sustainability and Revenue Models for Online Academic Resources. It is the organizational home to Portico, a digital preservation service, and NITLE, a suite of services supporting the use of technology in liberal arts education.
The new combined enterprise will be called Ithaka and will be dedicated to helping the academic community use digital technologies to advance scholarship and teaching and to reducing system-wide costs through collective action.
This is a natural step for these organizations. JSTOR and Ithaka already work closely together, sharing a common history, values, and fundamental purpose. During 2008, the Ithaka-incubated resource Aluka was integrated into JSTOR as an initial step, further strengthening ties between the organizations. JSTOR will now join Portico and NITLE as a coordinated set of offerings made available under the Ithaka organizational name. . .
In addition to JSTOR, Portico, and NITLE, Ithaka's existing research and strategic services groups will remain important parts of the enterprise. The board will be composed of Ithaka and JSTOR Trustees, with Henry Bienen, President of Northwestern University, serving as Chairman and Paul Brest, President of the Hewlett Foundation as Vice Chairman.