The links are mostly good but there is a newer more up to date version of the rules, which we as a community try to update yearly or at least every second year, to include more lists that have been approved.
For the most updated version I refer to the following site:
http://www.net-armageddon.org/On that page there's a link to two documents
1) the tournament pack (rules + approved (only) lists)
2) the army list compendium with all the list the netEA* community works on (devided into experimental, developmental and approved).
*(net-Epic Armageddon or 4th ed epic = the most rescent edition)
The first link to
army cards seems to be for netEA compatible cards. [Edit] but you really don't need them when you have the traitor legion army list builder app [/Edit]
The 2nd link to
army cards are for another version of epic though, called
net epic. It's quite different from Epic Armageddon (4ed epic).
net epic is a community driven development of the epic Space Marine (2nd ed epic)
that started way back when GW released epic 40k (3rd ed epic) which was not much loved by the players..