As posted here by Ryan Stewart, there are updates to Silverlight which include a few changes to API as well as some controls, which are included in the most recent service pack to Blend 2.5.
The push and pull between Flash and Silverlight hasn’t truly begun but Ryan and Scott are both talking about how its “almost there” in terms of Silveright’s eminant dominance (or that’s my summary).
The interesting thing that I would like to mention is the current job listings market. More and more, a web designer is required/requested to know CSS, XHTML, XML, Javascript, and Flash.
When will XAML be added to this list?