Complete Psionic lists some extra feats which market themselves as alternative versions of Wild Talent. It says that Talaire humans need to take one as their bonus feat, but it doesn't seem to say whether or not anyone else can take them. The regular Wild Talent feat has no prerequisites, so it would make sense in that way, but it seems somewhat unclear, since the book explicitly calls them feats, but then doesn't have the regular information for them that feats normally have.
But what seems to be implied is that, for example, despite the feat's name implying a connection to the human House Adon, a pegasus could take the Wild Talent (Adon) feat and gain all its benefits?
(The stuff about Hidden Houses starts around page 141 of Complete Psionic, as far as I can tell)