Flipboard creates personal magazines from RSS feeds that you can read on your iPad, iPhone, or iPod Touch. It will even integrate with your Twitter account and pull in tweets to help keep track.
This is a great list of ways to curate content. Most of them also have apps. Diigo and PearlTrees work well on iPad. Flipboard is another great option.
With Pocket, it's possible to curate content to read offline or online. It has similar features as Diigo, but uses a visual interface similar to Flipboard. Definite potential here.