If you’ve been looking for a simple, clean app for bookmarking pages to read later, you’ve gotta check out Instapaper Pro 2.0 for iPhone and iPod touch. The app downloads copies of webpages in an iPhone-readable format, and that’s just the beginning. You can sort article into folders for better organization, and mark specific articles as favorites, which can then be shared with friends. The app can update articles in the background, so that while you are reading one, the others that you are saved are updated to their most recent versions. There’s also a very cool feature that lets you scroll up and down just by slightly tilting the iPhone towards or away from you ever so slightly. It sounds silly, but it works great.

Instapaper Pro 2.0 is available now in the app store, and is currently selling at a 50% discount at $5, down from the normal $10. Oh, and for all you Tweetie fans, did you know that Tweetie has Instapaper support built-in?