One thing that prevents my full migration from laptop to iPad for RSS reading is DOI (document object identifier) capability. RSS feeds for academic journals often include DOI links for full-text PDF. When I'm on my laptop, whenever I come across a DOI, the DOI-handler plugin within the Firefox can parse it and fetch the PDF, which I subsequently save in Dropbox for future reading/annotation with my iPad. Unfortunately, there doesn't seem to be an app that can parse a DOI and fetch the PDF. This prevents a one-stop workflow of RSS reading within iPad and inevitably necessitates RSS reading with my laptop. Any suggestions?