For the prototype.js users -- is it worth it?
Plugawy: Depends on what are you going to do - I created quite big apps in both jQuery and Prototype.Whatever you want to do - you can do in both - it all depends on the size. I find Prototype better for big projects where you can use it's class system. It feels like Ruby as well.jQuery on the other hand is small and gets the job done, but without a plan on how to structure your code things can get really messy.