1. Fetching content with AJAX and placing it into the DOM is "supported" by every web framework in existence. 2. Proxying ads through your own backend that threads itself? Yawn. 3. AJAX and COMET have pretty standard support. Again, this is left up to you with your Javascript library of choice. 4. Again, this is Javascript work. It might save me a little bit of development time, but I'd much rather be in complete con…
1. Lift goes further in enabling convention over configuration for common AJAX tasks that are part of normal workflows, so there is less boilerplate to write. 2. Parallel rendering means you can move to a SOA where different components on the UI are served by different backend services. This can be great if you have a recommendation service, a shopping cart and main content areas that are all served by different syst…
nitrogen [http://nitrogenproject.com/] is worth a look