'AWS Public Data sets' has full Wikipedia available in TSV format
There are a number of other data sets also available, read more here.
They also describe how easily you an use these data sets:
Instantiating these data sets is basically trivial. You create a new EBS volume of the appropriate size, basing it on the snapshot id of the data. Next, you attach the volume to a running EC2 instance in the same availability zone. Finally, you create a mount point and mount the EBS volume on the instance.