You might consider adding another category: "Dead Links" - Although these links can not be found, they are probably still there in some form on the Wayback Machine. I use FireFox which has an extension to add a right click context menu item, "Wayback This Page", which if clicked gives a list of saved web pages of that site over the past few years.
Alternatively, IE and other browser users can go to:
and type in (copy & paste) the URL of the supposed dead site.
I checked Wayback for the recently defunct Sir Random's page (http://www.handspun.ie/daniel/
) and found a pretty complete copy of the webpage still available.
You can even find Ironlord's old Blade pages on Wayback. - Put this URL into Wayback: http://iron.lord.bei.t-online.de/index.html
Also missing from your list above
is the "Order of the Sword" page here at Arokh's Lair: http://www.arokhslair.net/severance/
In the Order of the Sword links page, there is this Spanish Blade page, "Blade the Game" which is still online:
It also has a semi-active (even in the last week or so) forum with some poor souls asking Blade questions (among non blade related questions attempting to hijack the forum for advertising purposes). Maybe some of our Spanish forum members could point them here or answer their questions.