Well, I have some updates.
First, Wikia isn't willing to go nuclear and call the cops on Nate, figuring he's likely too impotent to actually carry out his sad little threats. They just want to keep blocking him until he goes away, which I warned them will take awhile since there are a crapton of IP addresses on this planet, but we'll see how that turns out. Instead, they have blessed my efforts to put out a warning to wikis affected by the clown and wikis are banding together to swap notes on how to best deal with keeping this lunatic out.
He is not happy with this and occasionally tries to rage post, but it doesn't last very long anymore.
Yours truly is already shoring up one wiki with all sorts of anti-vandal tools to make his life even harder, and I've offered to perform the same services for other wikis this idiot refuses to leave alone.
If you guys want to help, let me know if you all spot Nate activity anywhere, I'll be happy to keep tabs on his nonsense and report it.
If you want to see him salty I've reported him:
http://thefbiwarningscreens.wikia.com/wiki/Thread:4785
http://archive.is/t7ReU
And if you want to keep track of him on Wikipedia:
https://en.wikipedia.org/wiki/Wikipedia:Sockpuppet_investigations/Nate_Speed
Keep in mind new ones might show up for him on this page from time to time, they had to flush some more puppets a few days ago, he'll certainly try again eventually.