Just look at that gorgeous app!
Viz Media, one of America's leading manga translation companies, recently launched an iPad app, so those of you with said tablet device can read and buy oodles of manga. And for the month of March, they've seriously ramped up, adding tons more volumes and offering all Volume 1s for just 99 cents all month! There's also a sizable selection of freebies, so you can dip your toes in the manga pool without having to go anywhere near your pocket.
Take a gander at this page Viz has set up, which goes over many more of the app's features in detail.