Last month, Michael Scherotter, a Microsoft Developer Evangelist and Silverlight expert did a great 2 day even in San Francisco on Silverlight. His aim was to focus on designer, but as a developer, I like to see how the other half thinks. Seemed like about 30 people were there and I'd say everyone got good stuff from it. I had never met Michael before but have been a regular reader of his blog. One of the things I really liked was that Mike seemed to have a great handle from both the dev side (like me) and the designer side. His focus was around Expression Blend 2.5 Turns out he is an real architect (builds buildings not code) by training and from what I know, that brings a discipline into design that is similar to the way us Dev's think.
If he ever does this again, I highly recommend you go if you can.
BTW, here is the agenda he followed.
1. System Configuration
2. Overview of Silverlight
3. Expression Blend
a. Graphical Elements
g. Styling & Skinning
5. Event Handling and code behind
6. Controlling Media
7. Controlling animation
8. DOM Page interaction