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Is there a drawinfo example with water waves? I think some of the anomaly's maps have this feature, but I can't find them.

I would search this forum for the word "normandy", then download some maps and search through them, pull out the water code, then post that. But i'm too lazy for that.
I'm sure there are excellent examples of waves in other maps, if you look around. Jefenry comes to mind. Looking at the materials will guide you to the object you want.

The wave effect basically is a giant circular mesh with "wavy" surface made spinning around its center. If you then hide the center of that mesh you will have rough sea. Also make sure to have some mirror ground underneath it for more of an effect

My drawinfo waves are simply a large flat, doughnut shaped mesh that is centered outside of the map. The mesh is wavy and I turn the mesh itself in one direction and use a texturematrix to spin the texture in the opposite direction. That way it looks like the water's "foam" is generally standing still but the waves are making it rise and fall. I like using pyrwall.png as the water texture since it's a little darker than water.png.