Apple's iBooks app is an ePub and PDF reader, and one could write a lengthy article about its interface. However, in the context of these posts on visualising the scientific article there's one feature that has particularly struck me. When reading a book that cited other literature the citations are hyper-links: click on one and iBooks forwards you (via the page turning effect) to the reference in the book's bibliography.

Starting to get serious about the Grand Challenge. First step is to parse the XML data Elsevier made available. Sadly this is only for Molecular Phylogenetics and Evolution for 2007, I would have liked the whole journal in XML to avoid hassles with parsing PDF. However, XML is not without it's own problems.