Ethiopia had one of the most socially and politically wracked situations in modern history up until the '90's. Much more than even the Kenyans, the athletes have been subject to the dictates of their oppressive government policies. Add in the African boycotts of the '76 and '84 Olympics and a series of massive famines in the 70's and 80's, and guess what, they were lucky to field any athletes at all, much less of the caliber of Yifter, Kedir, etc..
Maybe Kenya and Ethiopia, two of the poorest nations on earth, are part of a huge drugging conspiracy, or maybe, just maybe, the myriad of environmental and genetic circumstances (tell me that having a massive pool of men of the 5'6"/120lb physique isn't in itself a major advantage) that allow them to be that extra few % points faster at the highest level have merit.
Doping suspicions are always going to swirl around EVERYONE at the top of our sport. Just look at the comments that Paula "clean sport" Radcliffe garners on this site. What I do know is that Gebrselassie engenders every positive psychological, and I dare say, spiritual quality to be found in a runner. And hell, he's at least partly responsible for Paul Tergat's marathon career!