Jaime Basilico (of the NY MTC) and Rupal Shah (or Teradata Corporation) just published this White Paper:

This paper describes the results from functionality and basic performance testing of SQL Server 2005 Analysis Services leveraging Teradata v12. This paper is targeted at Business Intelligence (BI) administrators, system integrators and database administrators. Readers are expected to have a basic understanding of the features of the Teradata Database Aggregate Join Index and Microsoft SQL Server 2005 Analysis Services products.

 Nice Job guys!