In my
last blog (), I had talked about Mix 2010 and the expected release of VS 2010 and Silverlight 4. The good news is that these are now released. You can get VS 2010 RTM via MSDN
Subscriber downloads and Silverlight 4 RTM runtime can be installed from
here. To get the add on tools for Silverlight 4 to work with VS 2010, check
here. Note that a compatible Blend release is available, while the RTM for Blend is expected to happen a couple of months down the line.