According to FED, bat rules don't go into effect until 2012. We are being told what they are so players/coaches can wean them out.
The following is from the NFHS website:
2010 Baseball Rules Changes Include Bat Standards Adjustment
FOR IMMEDIATE RELEASE
Contact: Elliot Hopkins
INDIANAPOLIS, IN (July 6, 2009) — The clarification of baseball bat specifications was among four rules adjusted by the National Federation of State High School Associations (NFHS) Baseball Rules Committee at its annual meeting June 7-9 in Indianapolis. The rules changes subsequently were approved by the NFHS Board of Directors.
A change to Rule 1-3-2 regarding bat specifications was made in the hope it will clarify bat compliance. The rule, which will be effective January 1, 2012, specifies that the bat should be a “smooth cylinder implement from the top of the cap to the top of the knob.”