A few people have asked me recently when an updated version of Discoverer OLAP will be released that supports the 11g OLAP Option.
The answer is simple - it has already been released!! (but I guess that many people missed it because it was bundled as part of a broader patchset and not widely announced)

If you are interested, you can download it from OTN under Portal, Forms, Reports and Discoverer (11.1.1.3.0)
An updated version of the BI Spreadsheet add-in has been released too and can also be downloaded from OTN