I just got off the phone a few minutes ago with a Best Buy employee that confirmed that today’s (August 7, 2010) Dragon Quest IX event at Best Buy’s Battlefield location has been canceled due to Missouri’s tax free weekend.
The same employee attempted to find out but was unable to discover whether the event will be re-scheduled or not.
There are (to my knowledge) no other Dragon Quest IX events scheduled for the Springfield, Missouri area at this time. If anyone knows of any such events, please post a comment.