FierceGovernmentIT.com
The article states that DNA tests require a 3 hour turnaround time and a $50-$500 price tag for each query. Very few identity management applications are practical within these constraints.
Most time frames for DNA analysis floating around on the web are 3 days for rush jobs and up to 6 weeks for normal testing. In some things, time and money are interchangeable but this isn't true for everything.
Taking the data in this article at face value, it seems that a 6 week DNA analysis could be done for $50 and the price will go up as the turn-around time is shortened. There is also the fact that all DNA analyses are not equal. Searching for a Y chromosome to determine gender will take far less time than using DNA to discriminate among siblings.
That DNA isn't viable as an access control biometric is a drastic understatement.
On the other hand, if DNA is all you have to go on, it's a great biometric.