Sounds interesting...I'll take a look at the other thread. I like the idea of hashtags for flexible categorization, but I think we need to go further, e.g. now I can see all #startup #article emails my coworker sent me, or all #vacation #photo emails from my college roommate who travels for a living, but do I really have to click into each email to get the link to each article or image attachment? Can't there be something that lets me choose hashtags:#vacation #photo,sender:John Doe and returns a CoverFlow type gallery of all the images, with the text of the emails as captions? Or hashtags:#startup #article to get a Flipboard type personalized magazine made up of the formatted text of all of the articles found.