I’ve flogged this capture from “Beyond the Paper” to illustrate an important new feature in Autodesk’s free .dwg drawing viewer.
It could always view, print and publish (to DWF) but Autodesk DWG TrueView 2009* will finally measure! There is more about the new TrueView at:
* Does the T (for TrueView I presume) button icon “read” as a rotated IT to you or is it just my dismal eyesight?