Amazon SimpleDB - Now With Select

Amazon SimpleDB now has support for a SQL-like language for queries. Modified to support multi-valued attributes.

...the following query returns all the items which have the values 'Book' and 'Hardcover' in keyword:

select * from my domain where every(keyword) in ('Book', 'Paperback')

http://aws.typepad.com/aws/2008/12/simpledb---now-with-select.html