I found out about 15 minutes ago that SQL Server 2008 RTM version is available for download from MSDN! Congratulations to the SQL Server team!
As I watch the 3 GB download trickle slowly onto my hard drive, I'm left with a few questions at this point, like what version of NETFX will be installed when I run setup? RC0 so nicely installed the .NET 3.5 SP1 Beta Framework onto my machine, and since .NET 3.5 SP1 itself has not RTM'd, what are they going to do? Distribute the beta with the SQL Server RTM bits? Release .NET 3.5 SP1 to manufacturing? Remove the install dependency on .NET 3.5 SP1?
I'll know in [checking the download rate] about 3 days from now. ;-)
UPDATE: Well, come to find out, a few days later, Microsoft released the RTM version of NETFX 3.5 SP1. You need to have Visual Studio 2008 fully upgraded to SP1 (which will include the NETFX 3.5 SP1) before installing SQL 2008.