Pocket (formerly "Read It Later") is a must have app for information junkies. Its definitely one of my most used apps, across all platforms. I personally access it via the web and iOS apps.
You can save articles with one click from a huge range of services, including Flipboard, twitter, Zite, etc.
You can even email content to a email address and the articles appear in your reading list within the app.
This is a lifesaver for anyone who's on the road a lot and particularly for frequent flyers, as all the articles are available for reading in offline mode.
Great service and one I use multiple times a day. Best of all its still free.