Im working on a (fairly simple) bitcoin trading simulation, called GoxGame.
The idea is simple; every player gets a certain amount of virtual dollars and can use those to trade on a virtual exchange which follows MtGox prices more or less in real time. After every 2 weeks or so, a winner is declared and the amounts reset.
In order to make sure people actually trade rather than buy and hold, players will receive a penalty if they do not meet a (to be determined) treshold in trading fees (set at 0.6%).
Players will only be allowed to register with their forum names, so 1 account per forum account.
Here is a screenie of the WIP:
About the chart:
The chart is updated in realtime.
You can click the legend to show/hide various elements.
Depth 2500 shows the price swing 2500BTC would cause in either way.
Also note you can download the chart as bitmap, vector, or PDF if you want
As for trading, history, ranking limit and stop loss orders are being worked on.
I will also make something to visualize how you are doing compared to others
You can have a look here:
http://goxgame.sytes.net/demo/Chrome recommended.
If you have some good ideas I may not have thought of, feel free to share.