Thanks to rnm1978 for alerting me to the availability of this rather juicy document on MOS:
https://support.oracle.com/CSP/main/article?cmd=show&type=NOT&id=870314.1
And the really cool part?
Oracle positions Exadata solution as fast and efficient hardware for addressing I/O bottlenecks in large volume environments. The internal benchmarks for running Oracle BI Applications on Exadata will be published soon.
Sweeeet!