Just a quick heads up that I released the 2.1 version of my FogBugz scratchout plug-in, which you can download from the plug-in Gallery.
Customizable Scratch-out display format
Enable Scratching out by project
Improved UI with 75% less clutter.
Scratch-out/restore buttons now only appear when you mouse over an event.
Tracking/Display of Scratcher
For more information on this plug-in see “New FogBugz plug-in enables you to erase history”