I believe he's talking about WORLD seeds. Like in Minecraft.
There already are world seeds. The default seed is 0.
The stand-alone server lets you set your own seed. (100 is pretty neat with caves right near spawn.)
Hint: the mythruna.db directory is the same for single player or for a server. So if you run the server just long enough to create the mythruna.db then you can also use that for your single player games and have a non-zero seed.
Eventually this will be exposed through the UI but I have a special UI I want to build for it... so I haven't done it yet. Also, I have to add support for playing different worlds from the same client.
HA! Good to know. That is what I meant by 'seed'. Thanks much!