I just noticed on Scott Guthrie's blog that Microsoft is going to support jQuery.
I think this is a great decision and I can't wait to see how it will affect the Microsoft AJAX Framework. And in particular how component partners like Telerik and DevExpress will change their code to use jQuery instead of the standard Microsoft AJAX framework.
We will also distribute intellisense-annotated versions that provide great Visual Studio intellisense and help-integration at design-time.
Pretty exciting for a late Sunday afternoon ;-)