Starcraft – Can you see old Score Sheets ever again in SC2

There should be a button within the Starcraft 2 Galaxy Editor: "Test Map" or the like, that will automatically launch the game and the custom map. As far as I know, that functionality doesn't require access to the internet (because it was still doable during the downtime between beta phases, where the beta servers themselves were offline.)

Edit: There is now an in game clock feature. It can be enabled by going to options, gameplay, and then enabling the in-game clock. The below is old information and no longer relevant.

There is currently no way to view the time elapsed in game. The lack of this has led to numerous threads requesting the feature on blizzard's forums. There appear to be no plans currently to add it, but I would not rule out the possibility of it being added eventually given all the requests blizzard is receiving.