The AdventureWorks2012 OLTP database name was updated in February for SQL Server 2012 RC0, based on customer feedback from its original RC0 release in December 2011. Basically, the database, filename, and logical files were renamed from AdventureWorks2008R2 to AdventureWorks2012, as indicated on the CodePlex page.
For the RTM release, AdventureWorks2012 will be published along with the RTM versions of AdventureWorksDW2012 and other sample projects by EOD Monday, 3/12.
AdventureWorks2012 will have two versions: AdventureWorks2012_Data.mdf for case-insensitive collation and AdventureWorks2012_CS_Data.mdf for case-sensitive. You will also be able to download a DDL script and .csv files to install the database from script. The dates in the database have remained circa 2008 dates.