Saw a story from Wednesday on an announcement made at Oracle Open World this week on the new HP / Oracle Data Warehouse Appliance offerings:
http://www.cio.com/article/451166/Ellison_Pitches_High_Speed_Data_Warehouse_Server
We are starting to see more of these hybrid models coming out, where the definition of the Data Warehouse Appliance is blurring. Traditionally, vendors in this space offer software and hardware solutions bundled together (i.e. Teradata). We have seen offerings in the past year and a half where storage only solutions are being sold, and in other cases just some software supercharging below the database level. In these solutions, you keep your DBMS (Oracle, MS, etc) the same, the software integrates at a low level in the DBMS software architecture. It is like dropping a V8 in your compact car, your controls stay the same, but your have a tad more power...8)