This article states that there is a new TSB for the SPD6:
http://www.nytimes.com/2010/06/27/automobiles/27TSB.html
MAZDA Owners of several models may hear a loud ticking noise when the vehicle is started. In T.S.B. 0102810 issued on May 14, Mazda said several models 2007 Mazdaspeed 3 , 2007 CX-7 and 2006-7 Mazdaspeed 6 might need new actuators for the engines variable valve timing system.
Anyone with this issue may want to bring their's in.
http://www.nytimes.com/2010/06/27/automobiles/27TSB.html
MAZDA Owners of several models may hear a loud ticking noise when the vehicle is started. In T.S.B. 0102810 issued on May 14, Mazda said several models 2007 Mazdaspeed 3 , 2007 CX-7 and 2006-7 Mazdaspeed 6 might need new actuators for the engines variable valve timing system.
Anyone with this issue may want to bring their's in.