From a Post by Chris Meadows on TeleRead:
Galleycat reports that a group of 39 Japanese manga publishers has launched a portal site called JManga, offering digital English translations of manga readable in a Flash-based on-line reader. The manga is for sale via point-based subscription, but also offers free one-issue previews. It has a number of popular titles now, such as Naruto and One Piece, and plans to have 10,000 titles available by 2013.
See Also From JManga: JWeekly
Three free previews each week.