I too am having this problem. Have tried absolutely everything with our webhost – vidahost. Maxed out the memory, timeout and the server is at capacity.
It would be really good to be able to import the full demo content – it looks incredible.
Ed – this is an impractical option but is there anyway you could upload a copy of the database that is attached to the demo site? We’d probably need a zip of images to upload too with the correct directory.