the IWW isn't an ANARCHO-Syndicalist union. It's an 'apolitical' syndicalist union.
That said, I don't have a problem with it being on the anarcho-syndicalist page as the only anarcho-sindicalist organization in North America is the Workers Solidarity Alliance, which I don't think is affiliated to the AIT-IWA either.
The WSA isn't an anarcho-syndicalist union, it's a small propaganda group.
Same goes for the Anarcho-Syndicalist Review that's published out of Boston by Jon Beken (sp?) who's also the editor for the IWW's Industrial Worker newspaper.
I do think there's a lot of anarcho-syndicalists in the IWW, and if I was a anarcho-syndicalist I would consider the IWW a prefered organization to organize in than the WSA or being fully isolated.
The absence of a syndicalist union that's a real alternative (niether the WSA or IWW have enough strength to be real alternative to the trade unions), is one reason that I went from anarcho-syndicalism to 'platformist' anarchist-communism.