Everquest Landmark alpha is out for those who have brought a founding pack. I myself haven't purchased it as it is basically paying for a alpha test of a dev tool.
It did look tempting until I realised all the bonuses were for Landmark and not Everquest Next.
I rather wait for landmark to go open beta which will be free than fork over cash to play something buggy and unstable.
I am still keen on Everquest:Next and could see myself buying a founding pack for that but not for Landmark.