Half an hour of your time can already be a very useful contribution to Gondor.

Check the forum section: Creating the World of Gondor

We're also experimenting with a Wiki Encyclopedia  to enable all our players to add content to the game.

We have many different tasks varying in complexity and duration. We have small tasks like writing pieces of fantasy flavoured descriptions of monsters, treasures up to the most challenging jobs like writing a order GUI for computer programmers. (A Java Gui is currently under development)

We also have people that don't even play the game, but just enjoy contributing to the world of Gondor. 

Writing fantasy descriptions for treasures is probably the easiest task to do. Designing quests and dungeons is a little more difficult but very cool. Good at math ? Help us make nice formulas and algorithms to calculate the outcome of a battle or succesful casting of a magic spell. Love to program with Java, C++, Delphi or Visual Basic make us a GUI !