Marco Arment, posting on the Instapaper blog, has announced the release of Instapaper 4.0 for the iPhone & iPad. Marco's post outlines, in detail, all of the new features packed into 4.0 including: * complete navigation UI redesign * tweaked reading UI redesign * support for wikipedia lookup * footnote support * multi-select support * expanded sharing support for browsing - see all links in your Twitter/Facebook/Tumblr feeds that friends have shared * complete reading and archive list search support * app directory showcasing Instapaper compatible apps * other minor features App Store Link