John Diorio a Product Manager on the Google AdWords team shared this tidbit today:
#AdWords Friends… a small reporting tidbit… you can now chart the following 5 metrics in AdWords: Total Conv. Value, Conv. Value / Cost, Conv. Value / Click and both Value / Conv ratios.
These values have been reported in Google AdWords for some time. However, Google now added the ability to view this data on a chart.
Source: SERoundtable