There are a lot of people out there trying to compete to be your front-end Ajax/ web 2.0 framework of choice.
In the midst of technical framework comparisons, ask yourself, "Where is the RIA Industry Going?"
We feel the future of RIA's is the 'Next Plateau' where frameworks are absorbed into IDE's and online content management tools.
Web 2.0 UI toolsets are falling into two major categories:
1. Visual Effect frameworks - transition effects for content display
2. Application Frameworks - layout management and ever growing widget libraries
