i'm currently programming an iPhone game and I would like to create an online multiplayer mode. In the future, this app will be port to Android devices, so I was wondering how to create the game-server  ?

First at all, which language should I choose  ? How to make a server able to communicate both with programs written in objective-c and Java  ?

Then, how to effectively do it  ? Is it good if I open a socket by client (there'll be 2)  ? What kind of information should I send to the server  ? to the clients  ?

Thanks for your time.

I am currently programming an iPhone game and I would like to create an online multiplayer mode. In the future, this app will be port to Android devices, so I was wondering how to create the game-server?

First at all, which language should I choose? How to make a server able to communicate both with programs written in objective-c and Java?

Then, how to effectively do it? Is it good if I open a socket by client (there'll be 2)? What kind of information should I send to the server? to the clients?