Found this on ANN:
ANN has confirmed that the JManga.com website is the manga portal revealed last November by Japan's Digital Comics Association (DCA). The organization commissioned Toppan Printing, a Tokyo-based print and technology service provider, to create the site. The site will launch fully this spring, but the current beta version already contains free previews of the following manga:
Rosario + Vampire
Dragon Ball/Dragon Ball Z
With the Light: Raising an Autistic Child
Survival: Another Story
Onihei Crime Reports in Edo
Genju No Seiza
Samurai Harem: Asu no Yoichi
Town of Evening Calm, Country of Cherry Blossoms
Crime and Punishment: A Falsified Romance
Jyoshi Kousei (High School Girls)
Drifting Net Café
When I'm With You
Pet on Duty
Oh my god!
The Larceny Log of Zampei the Cloud Snatcher
The splash page for the site states that visitors will be able to read manga, connect with a community, and to "get to know" their favorite manga creators.
A representative of Toppan Printing informed ANN that Crunchyroll helped with "system development aspects" of the site. Crunchyroll formed a partnership with Bitway, a Japanese electronic book company originally launched by Toppan Printing, after Bitway invested US$750,000 in Crunchyroll.
Last June, the DCA and North American manga publishers formed a coalition against manga scan sites, and the coalition suggested that it might take legal action against these sites, although none have been reported at this time. The DCA currently includes the following publishers:
Asahi Shimbun Shuppan
ASCII Media Works
Bunkasha Publishing Co., Ltd.
Gentosha Comics, Inc.
Jitsugyo no Nihon Sha, Ltd.
LEED Publishing Co., Ltd.
Libre Publishing Co., Ltd.
Oakla Publishing Co., Ltd.
Shogakukan-Shueisha Productions (Sho-Pro)
Shonen Gahosha Co
Looks like the site will be up and running pretty soon.
Although, according to this reply on the discussion thread, it won't be free.
It goes by a point system to purchase manga:
Current Balance: 0 Points
$5.00 (500 Points)
$10.00 (1000 Points)
$25.00 (2500 Points)
Currently the average price for what they call a chapter (50pages or so) is 899 Points or so…