Sorry - this is very scrappy as I had the most horrendous headache and it's really difficult to type, watch, listen at the same time while being jostled by the person next to you because the room is so full... :-)
New in Silverlight 2
Libraries (part of SDK get packaged with your app if referenced)
In Visual Studio, a Silverlight application gets built into a xap file - zip archive - and deployed to a Web Project for testing / debugging. VS provides event handler hookup now from XAML to code behind.
Showed some simple layout, fully featured TextBox (including Japanese character support), editing, select, paste, tab between controls etc. TextBox and Button are content controls so can host, eg MediaElement. Showed video running in background of TextBox and Button and slipped by text typed into TextBox.
Cross-domain requests. Require a policy-file on the server either a Silverlight policy-file or a subset of Flash policy file syntax is also supported. Use WebClient class to perform POX request to http://catalog.video.msn.com which has the relevant policy file deployed. WebClient performs async HTTP GET. Fires event on completion and result passed through on event args.
Given the POX response, have various options to turn this into .NET objects but Linq to XML is great in this case as it allows us to query and re-shape the data very easily. Pull out all the videos in the catalog and map them to .NET objects using XDocument.
Use DataGrid to display list of videos. DataGrid is not in the core libraries but is in the SDK. If you reference the relevant assembly it will be packaged as part of your application.
Layout containers - Canvas, Grid, StackPanel, Border & Layout Extensibility
As per WPF.