Is there a way to jump to the I/O points (end of the work area) or just to find out the frame #/timecode of those points?
I don't think ther eis currently a keyboard shortcut to jump to the In or Out points, but they are visibly marked on the timeline, so its pretty easy to see where they are. Move the playhead to one or the other, and the timecode will be displayed at the top left of the timeline container. You can right-click the timecode there to set whether it displays as timecode or frame count.
I can see them by zooming in on the timeline.