Dojo's grid is a very nice grid as well. AsyncQueue is a nice api for command chaining. Dojo has dojo.connect which can be used to accomplish the same pattern w

Dojo's grid is a very nice grid as well. AsyncQueue is a nice api for command chaining. Dojo has dojo.connect which can be used to accomplish the same pattern with a little work but it is not out of the box. I am not sure if dojo has an equivalent to AsyncQueue. But back to the point of the original question there is no reason that you cannot use JQuery for task x and y and YUI for task z many of the frameworks play nice together so it may not be a matter of learning one over the other but rather using the pieces of the bigger frameworks with your existing framework.