Instapaper is the original "read later" service that lets you save web pages for offline reading in a highly optimized, distraction free format. It also syncs them between your iOS devices and the Instapaper web site, so you can catch up on your reading pretty much anywhere. A recent update includes some very nice visuals with iBooks-style page-turning animations and gestures.
For those who don't like page-turning animation because they feel it's too slow, you'll be happy to know that the pagination mode has also been improved to be lightning fast and more accurate.
Some other changes include a new draggable dot bar to replace the scroll bat in pagination mode, new two-finger-swpie gesture to close an article, automatic full-screen switching, the ability to share Drafts and Quotebook apps, and you can now select the Twilight Sepia color tint at any time.
I'm a big fan of Instapaper. It's gorgeous and rock solid, but with other great contenders like Readability and Pocket, you may also want to check out our Instapaper vs Pocket vs Readability: Read later app for iPhone shootout.