Another thing I found interesting at the Teradata Partners conference was something called "multi-temperature" data access.  It seems you can have different speed disks on the same system and the database will store "hot" (more frequently accessed) data on faster disks and "cooler" (less frequently accessed) data on slower disks.  Pretty nice feature.

Stephen Swoyer interviewed Randy Lea from Teradata and wrote the following article about Teradata's data warehouse appliances which I thought was quite good: http://www.tdwi.org/News/display.aspx?ID=9197.