I am also interested in hearing how others handle internal support request governance....
Our organization currently uses a SharePoint lists and workflows to route approval requests etc, and once all approvals are gathered, it's forwarded into OnTime via an email.
It's a bit cludgy because my customer (internal) gets one ID for the authorization request, and then once authorized they get another from OnTime. In addition, escalation paths etc get really messy.
So, that being said, I'd love to hear how do other people handle management authorization to minor feature / bug fix requests etc