I'm working on TUI and GUI on text LCDs and GLCDs. I have a phi_prompt library that one can use to construct HMI functions such as inputting numbers, selecting item from lists, menus of infinite levels, text inputs, text area displays with scroll (up/down keys), Y/N dialogs, OK dialogs. I didn't go as far as creating bar graphs or data charts on text LCDs but will consider it on GLCDs.
I use a four-directional pad plus two more keys for all inputs. The interesting thing for my buttons library is you can assign auto buttons that gets automatically pressed to save a physical button if you need, like inputting your name after beating the high score on a game console.
Take a look here see if you like any of the functions:
New features to be released next Monday:
http://arduino.cc/forum/index.php/topic,60830.0.html
Released features can be found here on my blog: