The question "So what's the relationship to h?" is a good one here; in particular, where does h end and other services/apps begin? I have quite a few thoughts in this area, including possible h spin-off companies, but my first interest in thinking about integrating it with other services is more from a strategic engineering perspective: what are the best places to focus h development so that it fits that composable unix-y philosophy of "do one thing well"; and I translate that thinking from tool to person... how can h help me do one thing well? As an end-user, even though I am admittedly a power-user with a lot of tools, I actually want to use as few tools as possible. The browser-extension part of h is the single most important part of the project from my end-user perspective-- the back-end infrastructure is there to support the browser-extension doing one thing well.
The one thing I want h to do for me that I can't do with any other tool that I know of is to allow me to rapidly track my reading and thinking and note-taking habits together. I want to be able to quickly select multiple portions of text and apply commentary and tags to the text within particular activity-based or goal-based contexts. The last part of that thought is the essential element I need that is missing. Speeding up the text selection would be very helpful in making it a tool I want to use on a daily basis for everything I do, but the contexts feature is what will make h a killer app for me.