This would really be useful. While traveling I have found I simply can’t use Chrome on my MacBook because it eats up too much battery, but then I’m stuck whenever I want to quickly add a citation from Safari. And, of course, it would make it easier to add things from my phone as well. Not to mention the fact that one could then integrate with services like IFTTT which offer email-triggers for RSS feeds and the like. Ideally I’d like not to just be able to email PDFs, but to be able to email, DOI, ISBN or URLs from supported journals and academic websites… (Even better if I could add tags, or have an “inbox” where I could then sort things later.)