I allready see many [url removed, login to view] clone projects here so it should be easy to find.
It should be easy to translate it to other languages and run on MySQL v5, PHP v4 or v5 on IIS v6.
The more features the better but the script should be optimized for handling many thousand users.
Please provide me a demo and I expect your bid is the price.
Its not an urgent project but would be find with a fast solution.