I'd find this out if I downloaded the BETA, but I wanted to quickly find an article talking about this but could not.
Can you use SQL 2008 Managment Sudio to connect to a SQL 2008 R2 server? I know you can't use an older version like 2005 to connect to 2008, I assume that's still the case with SQL2008 to SQL 2008R2?
Anyone quickly know the answer, if not I'll download the installer and just try this step out. We have already upgraded all dev boxes so in prep I wanted to be aware of this potential issue before hand as we plan for 2008.