Java Business Integration JSR (JBI) extends J2EE and J2SE with business integration SPIs. JBI employs concepts similar to J2EE to extend application packaging and deployment functionality to include JBI Components. Hence as per original JSR (JSR-208), the target platform for JBI is J2EE 1.4 and J2SE 1.4. A JBI Application is composed of one or more JBI Components. It may also include J2EE modules as defined by the J2EE Platform.
I am yet to look into the roadmap of Java EE 6 Standard or Java SE 7 Standard for its option (if at all, any) for SDO, but at least SCA and Tuscany supports pluggable middleware, so JBI is an ideal back end for SCA. Read the link on how-does-servicemix-compare-to-tuscany-or-sca to understand more on this.