I don't see what the difference in using Trello as opposed to JIRA would be other than we would have to use yet another service/system to track information that can be tracked just the same in JIRA, given it wouldn't be presented in the same visual format as Trello.
What's wrong with using JIRA for these same things? It seems to me that's what all Apache projects are doing... ya know... using the tools they (Apache) provides us. -omar