Our Infrastructure Development Team uses JIRA to manage projects (they've added a number of custom fields to handle this). As we try to move the rest of our organization to Daptiv, this group is pushing back on dropping JIRA and has even dedicated some development time to automating a JIRA to Daptiv dump (JIRA -> OmniPlan -> MS Project -> Daptiv). It seams that OmniPlan understands JIRA's output a whole lot better than MS Project and Daptiv will only accept an MPD file, which we can't get out of OmniPlan or JIRA.
Now that I've outlined what this team is doing, I have to say that it is really not the best solution in the world -- simply a work-around for folks who don't want to migrate off of their current tool. I'd be interested to hear if others have gotten involved with JIRA at all.
Darlene