They can identify currently the genetic makeup of certain dog breeds (Mutts). It is relatively inexpensive and only needs a cheek swab.
$60, as I understand it. It was an article in Money Magazine recently or something like that.
PROBLEM IS:
Dogs are MUCH more popular than snakes, and even with that being said, the research for said snakes would be long and arduous.
The market for snake genetic identification is still relatively small... So to have people get out and do it, the motivation is not quite there yet.
I would love to see it done, but... yeah.