Yes, there is a very good Return vs Risk graph put out at riskgrades.com. Look at it soon, because it will be unavailable after 6-30-11. The RA (return analysis) graph is what I think you are looking for.
The first graph shown is an "Average Return", which I was told was for a 3 year period. Three period returns of 3, 6 and 12 months, are also available. You can specify the ticker symbols of funds or stocks you want a display of. For funds, the return includes price and distributions (total return), but only price movement for stocks - per site webmaster.
I've used the graphs for a few years, since Forbes identified it as a "Best of the Web" site. Initially, I found numerous problems with some of the data and was able to work with the webmaster to correct them. Lately though, they have NOT been correcting problems that I bring to their attention. For example, try the symbols MUTHX, EDITX, AWSHX and you'll see that the Risk Grades on the graphs are seriously in error, and compress the graph results and cause overwriting and poor readability.
If anyone knows of a similar product, I'd like to know about it. Thanks, George