Something like middlewares or post-signals, when you post a ticket or get a new revision, or just any kind of event.
This way I can program an alert or an action when someone file a ticket about a component, or create a block for the next release on the deployment system if there is more than one bug ticket on the current release. Or just, send me an email of the tickets for a specific component that involves code I wrote, using some regexp or just looking for properties on the ticket.
It's just annoying have to get alerts and notifications of everything, or miss history of tickets you are not subscribe. I will really love to have a bug tracker that allows me, to be more sophisticated about what to do after someone post a new bug.