Silverlight and Flash... Oh, and the Silverlight Poster
Vishwas turned me on to this article, by Jesse Ezell, pointing out some of the shortcomings in Flash that are addressed by Silverlight. Unlike most blog posts out there, I found that the comments actually added a lot of good material to the discussion (at least through today's comments), so please read them as well. The discussion around this article is pretty sane, which makes me think Jesse did a reasonable job of pointing out true differences as opposed to just FUD. That being said, there are a few things in there that seem overly one-sided even to this never-touched-flash developer.
Also, here's a link to the Silverlight Developer Reference poster for Silverlight 1.1. I have a copy of this from MIX07 and it's pretty slick. Print it out and hang it up...or if you consider that too old school, make it your desktop background, or shove it on a slightly curved plane and add it as static content to the already-a-cliche video/image carousel you're dying to build in WPF :)