There are lots of articles on the topic of the changing DBA role now. Here’s a few examples
In the July/August 2006 issue of Oracle magazine the back page interview with Noel Yuhanna
At dbazine.com, Dan Burleson frequently discusses merging of the dba, data architect and data modeler.
There was a recent podcast by Jonathon Lewis on dbazine.com I think
At IOUG 2005, this issue was discussed at length. Here’s the SearchOracle.com report