However, there is little documentation on how to get the 2 technologies to talk to one-another. Microsoft are pitching ADO.NET Data Services to marry up with Sliverlight - and rightly so, but like a lot of people, my skills are firmly grounded in AJAX.
Searching around, Jim Fiorato has written a great article on integrating a data service with a YUI chart but that's about it at this stage.
So far I've managed to get a YUI DataTable to display data from an ADO.NET Data Service, along with paging and sorting.
I need to highlight a shortfall in the current version of ADO.NET Data Services (1.0) - it does not return a count of all rows. Without this, displaying pages of data is nigh impossible as we simply don't know how many pages to display.
I've created a sample project that contains a simple ADO.NET Data Service, and a sample page that implements a YUI DataTable. Note: You must first install the v1.5 CTP for it to compile.
I'm hoping to add more samples of other YUI components down the track.
Instead of writing a huge blog post explaining all the steps, I've added detailed code comments in the sample project.