Clone of Ikariam.org Web-based mostly-text game Web 2.0

We're looking for a clone of [login to view URL] online game. It needs to be a completely complete with graphics and all. It needs to be plug-and-play, where we upload it and run an install script and it should work. The code needs to be in PHP, AJAX, and database in mySQL. The differences from Ikariam: - Only one 'server', unlike Ikariam. - The entire game needs to be Web 2.0 (AJAX used everywhere, like Gmail) - You may use elements from [login to view URL] game and Runescape game as you see fit. - Things shouldn't be hard-coded in. Instead, everything (formulas, ratios, etc) should be controllable by the admin-panel. - There needs to be a language-file, allowing one to change all text displayed in the game. - The scripts need to be server-friendly and cache as much as possible, and reduce connections to the server as much as possible. The game will be played by 1000s of people, so it needs to be highly efficient.