This ocean shader makes foam on the peaks of the waves. Blend file includes an info text for beginners.
http://www.geocities.com/hazuki_wolf/Download/Ocean_Shader.zip
Your timing is wonderful, I have been fighting with that very thing for awhile now. 
Is it just my or it does not render correctly on latest build? (Even material preview has black spots all over…) 2.37 is fine.
Very impressive shader BTW.
YES!!! 8)