The only Q200 spar failure has been mine which is docummented extensively in Q-Talk #87. It failed and was repaired in late 2003 and has since had several hundred hours put on and flown at gross weights of 1300+ lbs since with no problems I've been able to detect on either spar. I continue to check the spar and canard regularly.
James Postma had the second failure in a Q2 with LS1 spar on April 21st 2005. He purchased the plane from Frank Folmer I think and has yet to determine if the canard/spar had been damaged and repaired prior or if the failure was a recent event. It is yet to be determined exactly how it failed or why but it was observed with a definite sag on the right side prior to the last flight. It should be noted that a sag on any spar should be addressed at once and no flight should be attempted in that aircraft until a repair is made.
Unless anyone knows different that is the total out of many many flying Q2 and Q200 (LS1) taildragger aircraft over the last 23 years.