Simba has opened up their beta program for their MDX provider that allows access to Oracle OLAP data natively from Excel.  They also quoted me in their press release.  Also, see what we published in our March newsletter on the subject.

If you have been wanting access to Oracle OLAP data using Excel pivot tables, we have a great solution for you!  No longer can Microsoft Analytic Services users claim they have to use MSAS to get the access they want from Excel.
Please let us know if you would like more information on this or other solutions.