I just looked on the NHRA website and they are cutting ticket prices due to the hard times to help get more people in on the action.
From their website:
Recognizing the tough times currently faced by fans across the country, NHRA has announced several fan-relief programs for the 2009 season, including reduced-priced general-admission tickets, the admittance of children 12 and under for free, and a military-appreciation offer.
Click on the link above for more details and this year's NHRA schedule.