AutoCAD 2005 introduced an option that allowed for ignoring hatch objects when using Object Snaps. AutoCAD 2006 continues these small tweaks with an option to ignore Z values when using Object Snaps. This can be a very slick way to make the current command use the current value of the system variable ELEVATION for the Z value. The setting can be found on the Drafting tab of the Options dialog box or controlled with the system variable named OSNAPZ. This behavior only affects picked points and not typed in coordinate values.
Keep watching for more information on the new release of AutoCAD 2006 right here.