This is interesting; my site provides something sort of similar, but with JIRA integration. I've been considering a pivot where the data is stored on the local server. Rather than using JIRA credentials, you'd define your own TODO list, and log 15-30 minute intervals with notes on what you've done. The hard part is creating the reporting faculties; there's lots of those for JIRA already.

If anyone's interested in something like this (structured time-tracking and task-based note taking), drop me an email and I'll let you know when I get to that point.