I'd be interested to know if there's something like Papers or BibDesk for Android. Something where you can browse ArXiv, save PDFs for later, and then read and optionally mark up what you've saved. Integration with bibtex would be nice as well.
A good PDF reader is the minimal requirement, but the organization is more important than the annotation for me. Possibly something like Zotero online would work, but I'd definitely want to see a review or find a store where I could play with one for a while.
