Also kind of interesting because he's the first Gelding to win the Kentucky Derby, since a horse sired by Man O' War did it in 1929 - Clyde Van Dusen (the name of the horse, oddly enough).
While yes, that was an expensive snip, there are generally reasons for it related to health, temperment or other mitigating factors.
If Funny Cide could win the triple crown (extremely unlikely) he would be the first Gelding to do so. But I keep holding out for a Triple Crown winner to capture some of the magic of horse racing that was captured by such horses as Seabiscuit, Citation, Secretariat, Man O' War, War Admiral and many others...
Cedric