My new app Cyberspace has just been approved today - iTunes link: http://bit.ly/getcyberspaceapp. In one sentence, it is optimized specifically for the purpose of reading, discovering, and sharing. And it's pretty good at them.
Feature list: reading queue, access to Pinboard/Delicious bookmarks, DuckDuckGo as default search engine, ad blocking, Readability bookmarklet, text mode powered by Instapaper Mobilizer, share to different services, Pastebot & OmniFocus support, scratchpad with TextExpander support, etc.