AutoCAD WS for the Android
AutoCAD WS will soon be available for the Android. It should be available for download on April 20, as was announced today.
One of the unique features to the Android version is "the text annotation tool supports integrated voice commands available on devices running Android 2.2 (Froyo) or above." - meaning you can add comments to a drawing simply by speaking. You can also print your DWG to PDF with this version.