The question is raised here
http://www.bluefinsolutions.com/insights/blog/is_sap_deliberately_locking_out_competitors_with_bi4/
Is SAP deliberately locking out competitors with BI4?
And here is the response from BW production manager of SAP
http://www.sdn.sap.com/irj/scn/weblogs?blog=/pub/wlg/23784
As far as I know "SOFA" is BOBJ's framework before SAP acquired BusinessObjects