Over at CGHeute, Max von Tettenborn has a short tutorial on using ICE in XSI to simulate a sphere moving through a small body of water and creating waves.  It’s a bit difficult to follow, since it’s written in German and only partially translated to English.  However, it’s got some good graphics and most of the text is understandable (perhaps with a bit of help from Google Translate, particularly PAge 2).

XSI ICE Wellen Tutorial | cgheute.