An article over at Realtime Windows Server Community were discussing whether Microsoft would release an RC2 build of Server 2008 prior to RTM. Well, thanks to the new Windows Server 2008 RC1 with Hyper-V Beta which is publicly available here, Microsoft’ may have inadvertently already answered that exact question. Since the Server 2008 build included with the Hyper-V Beta is a newer compile (6001.17119) than the originally released Server 2008 RC1 (6001.17051), Microsoft have included an updated EULA which directly mentions RC2:
Of course this doesn't guarantee that Microsoft will definitely release an RC2 build however it probably is a pretty good indication of things to come.
Download: Windows Server 2008 RC1 with Hyper-V Beta (build 6001.17119)
Source:→ winbetaWindows Server 2008, RC2, Release Candidiate, Hyper-V, Beta, Microsoft