Nope, it's not both a "ball" and a "balk".
For this infraction the ball becomes dead and the penalty is a "ball" added to the batter's count. Runners are not advanced.
See the attached link for 2007 NFHS interpretations regarding this rule (situations 7 through 14).
(Note: There are a couple of those situations where a balk IS called, but that's because the pitcher did something else besides just licking his fingers.)
http://www.nfhs.org/web/2007/01/2007...erpretati.aspx