FLOZz has been very busy since we posted his new Nautilus Terminal and a new version has already been released and it includes keyboard shortcuts to show/hide the terminal in Nautilus. When the terminal is hidden however, there is still a toolbar visible in Nautilus to unhide the terminal and modify its preferences:
To show the Nautilus Terminal, use:
Ctrl+Shift+T and to hide it: Ctrl+Shift+H Update: in the new 0.4 version, you can toggle the terminal on/off using a single clipboard shortcut: Ctrl+Shift+T.
The new version also supports copy/paste inside the terminal, something which wasn't available in the initial release (the usual Ctrl+Shift+C / Ctrl+Shift+V).
Installation instructions in our earlier Nautilus Terminal Embeds A Terminal Into Nautilus (Dolphin Style) post.