Tested in Firefox 1.0.4, Safari 1.3, and Internet Explorer 6.

Enter key makes new nodes. Tab indents, shift+tab unindents. Pressing backspace in an empty textbox deletes the item.

To-Do's:

• Save textbox text in LI's value attribute
• Auto-increase size of text input box as input grows
• Save/load node tree
• Drag/drop placement
• Show/Hide (collapse/expand) child nodes
• Status toggle for nodes (checked/unchecked or somesuch)

Have at it: