Sounds like something was hanging. I don't even have a PrintJobMgr process running (or anything with Print, Job or Mgr in the name). My DashboardClient has been really finicky the last couple days, though, and seems to be unresponsive again.
EDIT: Although this time at least, my Dashboard itself it still working perfectly. Previously I could see the Dashboard but not use the widgets. But its seems to be fine despite Activity Monitor saying it's not responding.