There's a great new website out now that provides you with "snack-sized" tutorials on how to build rich web experiences and applications using Silverlight and Blend. The website is called http://www.nibblestutorials.net/ and it's the brainchild of Celso Gomes, one of our top design engineers in Redmond (Microsoft's headquarters).
New tutorials will be posted on a frequent basis, so make sure you check back there often. The intent is that the tutorials be short in length so you don't have to invest a large chunk of time out of your day to go through them. There's also a blog at http://blog.nibblestutorials.net/ for the site that is RSS-capable, which means you can keep track of new stuff put onto the site as it happens!