Compiere released 2.5.1c as Limited Production. Compiere is the premier Open Source Business Application and according to IDC the disrupting the ERP marketplace (they are right ;-). Release 2.5.1c is the first release with transactions based on Workflow. In addition to great customization flexibility, it is also a big step towards database independence as Java replaced PL/SQL.
For details see http://www.compiere.org/product/rel251.html