Running Script in Game (at runtime)

Is it possible to have a gui text area in which the player/user can write a script and then click a button that says Execute and have the script be run? If so how can I do this?

http://answers.unity3d.com/questions/7885/interpret-unityscript-at-runtime.html

http://blog.tiaan.com/link/2010/03/15/csharp-interpreter-unity-plugin-console-debugger

http://answers.unity3d.com/questions/476395/can-i-run-a-script-in-real-time-on-a-browser-game.html