What makes Resig's work interesting to me is his port of the Processing lauguage, so the existing Processing examples can be run without Java. I haven't looked at the processing.js source, but I imagine it would run somewhat faster if you used his API directly, instead of parsing Processing code.
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If you're just looking for animation in javascript, some much more impressive examples are in the CAKE (Canvas Animation Kit Experiment).
What makes Resig's work interesting to me is his port of the Processing lauguage, so the existing Processing examples can be run without Java. I haven't looked at the processing.js source, but I imagine it would run somewhat faster if you used his API directly, instead of parsing Processing code.