Today Microsoft finally unveiled Silverlight 5! We have been hard at work the past several weeks building our controls and samples to multi-target both Silverlight 4 and 5. That means you will be able to use Studio for Silverlight in both versions of the platform. We have a new separate set of libraries specifically for Silverlight 5 which you can download from prerelease below. We do plan to continue our support of Silverlight 4, new enhancements and all, for at least the next year.
*Update 1/4/2011* You can now download the complete installer to get both Silverlight 4 and 5 controls. Through the installer you have the option to add the controls to the toolbox. I highly recommend that you only select the version you need because we have A LOT of controls 
Download the complete Studio for Silverlight 5 installer (includes samples)
Download just the Studio for Silverlight 5 binaries.
In this update you will discover a new class library:
C1.Silverlight.Binding
The C1Binding class enables you to write inline calculations, functions, and conditional formatting in your XAML binding statements. It depends on custom markup extensions which are not supported in Silverlight 4. By using C1Binding markup extensions, your XAML will be much cleaner and more expressive. But more importantly, you avoid having to write external converters elsewhere in your code.
Example of C1Binding markup:
<TextBlock Text="{c1:C1Binding Expression='Amount * 8.5%'}" />
<TextBlock Text="{c1:C1Binding Expression=
'CONCATENATE(Amount, " Tax: ", Amount * 8.5%' }" />
Learn more about ComponentOne Binding Expressions for Silverlight.
(+4 rating, 4 votes)
I second the request for the PDF viewer to support SL5 vector printing.
Jonas, yes we do plan to enable vector printing in all of our controls that support printing. Stay tuned to our next major update. – Thanks for the enthusiasm!
Hello!
Good to see that you will update support for SL5! Will the PDF viewer component also be updated to support vector printing in the SL5 version?