Blend 3.0 RC is there and it's pretty exciting to play with this new tool.
Things changed between the March preview and this RC version.
Let's play with a first very simple sample of what we can now do…
Blend 3.0 has a new useful asset library: http://blogs.msdn.com/unnir/archive/2009/05/22/the-blend-3-asset-library.aspx
In my sample, I'll just deal with an image and a textbox :
If I go into my assets library, I can find a behaviors category. That's the place where we'll be able to use all the behaviors available in the assemblies referenced for a project.
If I take the HyperlinkAction behavior and drop it on my picture in the designer, I can see the properties of my behavior.
The Trigger gives information about who can fire which event. The SourceName value [Parent] means here that the event is fired by the picture.
With the piker 
, you can choose any other element in your artboard.
The type of event is here a MouseLeftButtonDown but many other events may be chosen from the dropdown.
The common properties indicates here where to navigate and in which target window.
Here is the resulting XAML of my picture and HyperlinkAction :
With just 0 line of code and without Visual Studio, I can create links on any Silverlight element using this HyperlinkAction!
See you later!