I used this when I was in high school for my water rendering project. It's pretty decent, and has sample code along with the paper.

http://fileadmin.cs.lth.se/graphics/theses/projects/projgrid/

What specifically are you interested in? Reflections? Water optics? Wave simulations?

I have some articles on my blog:

http://mtnphil.wordpress.com/category/water/

Currently I'm working on an article about height field water simulation (waves).

This page has links to a lot of articles:

http://vterrain.org/Water/

I have a demo that demonstrates water that goes a little bit behind the basics (with that I mean refraction/reflection/fresnel), which you can find it here.

I also have a very simple implementation that is just a plane with a color and some scrolling normal maps, which you can find here.

You can download the source and/or the demo on the pages. I don't claim these are the best ways to do it (they were made with some tight time constraints), but it got the job done. Hope it's helpfull in some way.