Hi Romulo,
Well Atlas is going to be one implementation of AJAX, its looking very promising but we will see. My concern right now is its early editions are likely to change a lot before it is finally released. Once it is more finalized I know the mono team is interested in also implementing it. It will likely be built into the next version of .NET/ASP.NET currently code named Orcas so it will be very attractive at some point.
There are a lot of other free Ajax projects/tools/frameworks out there including the new
Yahoo UI I blogged about today.
One thing you can count on is we will be taking advantage of Ajax techniques in mojoPortal to make the UI very interactive. Already we have a SmartDropdown control used in the Module Settings page to select a user to give edit permissions to. I used an Ajax technique using the
Sarrissa project which is also a lightweight javas cript for doing cross browser Ajax. Because a site could potentially have thousands or more users it would not be feasible to populate a dropdown list with all the users, instead the SmartDropDown uses ajax to go get the users that match what you type. It only brings back a few records at a time using compact xml so it is pretty fast.
Cheers,
Joe