Great news today: the beta of Silverlight 5 has been released yesterday during 
MIX11 event in Las Vegas! Those who had the pleasure to attend Silverlight Firestarter already know what's coming on Silverlight 5 beta, so all you have to do now is to dowload it and start testing all these great new features.
Here are some blog posts announcing the release of Silverlight 5 Beta:
- Announcing the Silverlight 5 Beta Release and the Silverlight.net Redesign by Pete Brown
- Silverlight 5 Released - Download Silverlight 5 Tools by Kunal Chowdhury
- Silverlight 5 : A step ahead from Microsoft by Vikram Pendse
- Silverlight 5 Beta available! by Davide Zordan
- A new baby is born – long live Silverlight 5!! by Jose Luis Latorre Millas
- Silverlight 5 Beta has released…Get the chm! by Cheryl Simmons
- Silverlight 5 beta by Thomas Martinsen
- What's new in Silverlight 5 Beta by First Floor Software
- Silverlight 5 Beta by Alex Golesh
- Silverlight5 Beta released , Whats New ?? by Manas Patnaik