jQuery appears like a lightweight script assortment for visual appearances tweaks similar to those of script.aculo.us . The approach is a bit different in execution, since it follows a sort of chains of commands principle. The documentation and examples cover a wide range and further investigation will reveal if its up there with script.aculo.us or not. I for one like to see a different flavor of these new generation effects arising. A little competition and learning from each other never hurt.