Though I won’t laugh in your face, like some :), but I will gently suggest that if you aren’t yet familiar with jQuery, now is the time to learn. I can recommend jQuery in Action if you’re serious about it, but a simple Google search will get you most of what you need.
The other reason why this is big news, is that soon you’ll be able to open up product support issues with Microsoft about jQuery. Let that sink in for a second. An open source project, under the MIT license, will be fully supported by Microsoft.
I applaud Microsoft for making this decision. It’s not your typical Microsoft anymore.