Does Oracle have two ESB products: Aqualogic Service Bus AND Oracle Service Bus or did ALSB get merged into the Oracle SB product?
Currently, yes, strictly Oracle does have two service bus products. Wikipedia puts it this way:
"Oracle Enterprise Service Bus (ESB) should not be confused with Oracle Service Bus (OSB). ESB was developed by Oracle. OSB, formally known as Aqualogic Service Bus, was acquired when Oracle bought BEA Systems. The two products are related and interchangeable."
But that's not entirely correct. Both products overlap but they have different feature sets. In 11g the Oracle Enterprise Service Bus is being merged into Oracle's Service Component Architecture whereas the Aqualogic service bus is being maintained as a standalone component.