I just found this thread and after the disappointment of hatching three "Amerucauna" eggs I was bummed to realize I had been mislead. I am bound and determined to get real Amerucaunas and now that I know they come in the silkie variety, I am even more determined. Oh gosh they are SOOO cute!
Many people have been disappointed with their purchases because of all the naming confusion around Ameraucanas/Araucanas/Easter Eggers, etc. I have found a booming local market selling BBS Am chicks because pure Ams are almost always hard to locate. The silkied feathering is neat, but not without it's drawbacks, they are not as weather-proof (water soaks right through to their skin) and can't fly well (might be a feature for some folks, but they need low roosts and are more likely to be taken by predators). I'm not trying to dissuade you from getting silkied Ams, just noting that they have special needs compared to normal feathered ones.