The latest reports say that Microsoft Office 2010 has been signed off, and is in RTM stage. This means that it is going to the printing press, so to say. The final version is done. WZOR has a great track record of being right on these rumors, so there is little doubt that this is report is accurate.
However, Wzor notes that Office 2010 RTM should be expected any day now, and it was the Russian website that pointed to April 12 as the RTM development milestone for the productivity suite. According to what little information is available, two assemblies of Office 2010 are considered for the RTM Build. Wzor claims to have additional information related to the potential Office 2010 RTM Builds, but that it will only publish it after Microsoft decides which of the releases will be offered to customers.