George Anastasia has done features on Philly criminals that aren't LCN. The Pagans and a few black drug organizations at least.

I feel like Irish crooks would get a fair amount of media coverage if they existed. There's definitely an interest there, both in historical figures and fiction.

Sinn Fein is the political wing of the Provisionals. A lot of the leading figures in SF are either reputed to be members of the PIRA, like Gerry Adams, or were totally known to be members, like Martin McGuinness. With their military wing dissolved, Sinn Fein is just a political party at this point. They probably do some fundraising in the States but they're not a criminal organization.

The remaining IRAs are marginal in terms of influence and membership. Any international reach they have would be to the UK or maybe Spain. A lot of Irish criminals seem to end up in Marbella. American ties to the various IRAs were dwindling as the peace process made actual progress. 9/11 really put an end to it, though.

What are these sites you talk about? Care to share a link?