It’s a nifty program but it does have a couple of limitations. It’s intended for use with the medical bibliographic service PubMed, so incorporating PubMed articles is a simple matter of dragging and dropping, and iPapers will then retrieve the bibliographic metadata from PubMed much as iTunes retrieves track listings. For non-PubMed articles, though, the import process is much less straightforward. An obvious improvement would be to make drag and drop work for any PDF and to pop up the dialogue for hand-editing bibliographic data by default when the program can’t retrieve it from PubMed.
Even better would be to support plugins so third parties could write interfaces to PubMed’s counterparts in other fields, perhaps to CiteSeer or Google Scholar. The hardest part there might be determining unique identifiers by which to do the lookup.
Another limitation is iPapers’ model of metadata. It is strictly oriented toward journal articles, so books, handouts, PDF archives of webpages, etc. fall outside its scope. Maybe more importantly, iPapers doesn’t currently allow for user-definable fields or tags. I’m hoping for a tool which will let me sort PDFs by topics, courses, and my own writing projects.
But it’s new and hopefully Toshihiro Aoyama is still adding features. Check it out and send him your encouragement.