FI I had been of a decent age when he ran, I probably would have half-wishingly said so, and believe, even as young as I was back then I was still devastated when I heard his whole deal about somebody "spiking his toothpaste".
I just hope for a good race at the WC and do not believe there are much more hints pointing to Mikitenko being dirty than there are concerning most other athletes, as she has not made any large improvements on her PB at a time, nor is she continuously improving, but actually going through good and bad patches. And btw, there are actually quite a few really good marathoners at her age, who were just also-rans' for the longest time in their career, I believe.
But to be honest, I would not be completely surprised if there were some bad news surfacing at some point. But then again I wouldn't really be with any of the top-notch elite athletes out there (with the exception of a few)...