ColdFusion and ExtJS

I had such a good response from my cf_window project that I have decided to go forward and add on to it. My cf_window tag is no where completed but I figured I would let folks use it and get some feedback on it before adding to it or fixing the few small bugs I know of. I think what really got people excited was the ability to use the great Ext UI functionality with the simplicity that we are all used to. With that being said I am really open to suggestions on what to work on next. I know the grids, trees and tabs are at the top of everyones list but I would like to hear your opinions on it. I would also like to get some feedback on Ext in general. Did you just recently hear about it? Have you ever tried it before? What were your thoughts on the library. All of this well help me out a lot. Leave some feedback here or email me.