Bukkit

What is the enhancement in mind? How should it look and feel?

Currently you are limited by the length of chat with the length of commands you can put into the command block. Since with '/setcommand inputbasdjiasd' you can only go as long as the chat length.

But the problem is that command blocks can take quite a lot more than this, and so for very long commands we are limited by this plugin. I would suggest you also have an /addcommand option.

The /addcommand would add onto the end of what you have already written, rather than overwrite it.

Probably doable ;)