What does bloodsugar management entail though? Just mapping/graphing bloodsugar measurements vs. insulin injections? Is the missing piece the ability to take into account foods eaten, body mass, etc?

yeah. just (and then deriving useful conclusions from all the data.)

To my mind, the missing piece is a non-proprietary tool to make the collection of the data as easy as possible and integrate with devices from some large number of competing manufacturers.

Not so crazy.. but it doesn't exist as far as I know. I have dreams of trying to make it happen but, you know, the usual excuses.. (http://sanguinediabetes.com/)

What are the devices like to integrate with? Last time I had experience with bloodsugar tests, it was just a LCD readout. Do the devices now have things like bluetooth/etc to make connecting to a phone/computer easy? Or would this effort have to include working w/ manufacturers to create such connectivity?

A few points:

- there seems to be an underlying assumption that nobody is working on a better way to manage blood sugar levels for diabetics

- there are a lot more important things that better blood glucose measures if you're thinking of tackling the problems in global health; using the analogy of the blog article, one could also point to the med device companies and say "Why the fuck are people wasting billions of dollars per year finding a better glucose monitor system rather than tackling the millions of deaths due to childhood diarrhea??"