Color-less Classic -- A friend at Apple notes that Color Classic users can move the contrast slider bar in the Screen Control Panel all the way to the left, making the screen go pitch black. It would seem that users in that situation are stuck, since they can't see the slider bar any more, but pushing the screen contrast button on the Color Classic's front bezel will bring the screen back up.
Open Recent Office 2008 Docs by Date
Office 2008 applications like Word and Excel now list recently opened documents on a File > Open Recent submenu. Choose More from that menu, and you'll get a multifunction Project Gallery dialog. Click the Recent button at the top and then select a date range in the Dates list to find files that were last opened today, yesterday, earlier in the week, last week, and so forth. (The Settings pane in the Project Gallery dialog lets you set how many recently opened files show in the File > Open Recent submenu.)