Wonderware Historian 10 is expected to be generally available in February 2010. It’s going to be the first major release in few years. It will introduce a set of new features included “tier historian” – read more about what’s new here. This release will also introduce support for SQL Server 2008 (32-bit only) and Windows Server 2008.
Wonderware customers that have a valid support agreement will be eligible to receive Historian 10 license for free. Contact Wonderware PacWest if you want to get on support.

Note: Wonderware Historian 10 will only support 32-bit version of SQL Server 2008 installed as a default instance. Named instances of SQL Server 2008 are not supported.