As a developer using Ext JS, I am very excited to see this merging. I would like to see Ext JS making use of Raphael's graphics capabilities. At the same this, it will be very interesting to see how a jQuery backed mobile web development library is going to fit it. Will they rewrite the library using Ext JS core? Another interesting point is that both Raphael and jQtouch uses MIT license. The company also managed to get hold of Jonathan Stark to maintain jQtouch.
What I would like to see is a better visualization API (charting tools) based on Raphael rather than the YUI charts. It will be also interesting to see how these projects collaborate and how their outcome affects the developer community.
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