As announced on Soma’s blog, Visual Studio 2010 and .NET 4 Beta 1 was made available for download to MSDN subscribers today. If you are an MSDN subscriber you can visit the download centre and download it now.
I have installed it on a machine with Visual Studio 2008 as well and so far it appears to play nice (though I haven’t done any extensive testing).
It will be made available for general download starting Thursday, NZ time. Beat the rush, get it now!