Just found this thread with the chart:
http://www.bikeforums.net/showthread.php?t=468351

Does this mean if I have a 27 inch tire, with a 16 tooth rear cog, that I want a chainring with a tooth count around 39-47 (which would put my gear in the "road use green." with 39 tooth putting me at 65.8 and 47 tooyh putting me at 79.3?

Sixty Fiver says he likes to be in the 65-70 range for his SS, so that would my preferred chainring tooth count at 39-42?