I've put together a web site that can hopefully provide intra-day data access to anyone who registers (although, at this stage, I'm limited to allowing 20 users). Your data can be downloaded, and is displayed in a graph that can be zoomed. It's pretty rudimentary at this stage.
Fitbit has granted the site access to intra-day data (subject to each user's approval), but I haven't been able to test whether it will work for anyone but myself. If anyone would like to register an account and see if it works for them, I'd appreciate it.
The site is here.
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