You can't have directories, as far as I can work out. It's not a fatal flaw and it's one way to cut down on URL lengths, I guess. It'll make for a cluttered mess in your one and only directory though.
What perhaps is fatal though is there seems no way to save data to the server (other than via your console). It means people can't leave comments for instance, or a game keep the players' high scores.
Ideally, there'd be some way for a NeoCities' site to know if a visitor is from another NeoCities' site. (At the discretion of the visitor.) That could create communities here. Without that though, NeoCities will just be a way to have a very low-featured website.
Torn - 07-Jul-2013 11:56:59 UTC