It sounds interesting, but one of the things I didn't want was something tied to a specific system. This is a notebook that goes across several jobs - and depending on where you work, you could be using JIRA, or Mantis, or bugtac or something homegrown, or someething horribly legacy. So I didn't want it tied to anything specific, but to be a standalone tool.

Mind you, if you were working a lot with JIRA, I could see the appeal...