FP1 is now available and posted on the Business Objects download support site. You can access it here:
It applies to Xcelsius 2008 Engage, Engage Server and Enterprise. You must already have SP1. Customers buying Xcelsius after August would already have SP1. To confirm which version you have click on help -> about. The Build Number should be: 12,1,0,247.
Xcelsius 2008 FixPack 1 FP1 , KBA , BI-RA , Reporting, analysis, and dashboards , How To