From Microsoft, jQuery, and Templating:
The ASP.NET Ajax Library
We are moving the ASP.NET Ajax Library into the Ajax Control Toolkit.
If you currently use ASP.NET Ajax
Library client templates, client
data-binding, or the client script
loader then you can continue to use
these features by downloading the Ajax
Control Toolkit.
Be aware that our focus with the Ajax Control Toolkit is server-side
Ajax. For client-side Ajax, we are
shifting our focus to jQuery. For
example, if you have been using
ASP.NET Ajax Library client templates
then we recommend that you shift to
using jQuery instead.
Conclusion
Our plan is to focus on jQuery as the primary technology for building
client-side Ajax applications moving
forward. We want to adapt Microsoft
technologies to work great with jQuery
and we want to contribute features to
jQuery that will make the web better
for everyone. We are very excited to
be working with the jQuery core team
Once I read this, I stopped thinking using the Microsoft AJAX databinding which was a bit complicated and started using JQuery and it's JavaScript Micro-Templating. I did really like the idea of two way databinding that the Microsoft AJAX library had though.