Which makes it a bit annoying for Soldiers -- as they can't get Whirlwind Attack without multiclassing five levels into another class, yet it's specifically listed as being a feat they can take with thier bonus feats.
Really, this seems to be another case of the different rules between D&D and Conan not being fully accounted for -- this time in the listing of Whirlwind Attack in the FAQ. Soliders can still get it, but not as Soliders. Not really a mistake, but mildly annoying none-the-less.