Multiplayer? Where to start?

Where should I look for some multiplayer code and examples? I just need some general stuff?

Thanks guys

The shootergame example on the market place is a good place to get started, at least that is where i have started.

Ok sweet thank you.

UE3 - Good for start, many concepts covers

Some theory

mpo. First link is dead.

I am trying to find where connecting to URL is handled in the ShooterGame.
The reason is that I have a staic URL I want my clients to connect to by default. Or have a menu where one can type in or paste the url.

Another thing I wonder is if it is possible to create and share a Class Blueprint that handles the connection part and be able to reuse it?

This might be a god candidate for a Template. Do you think?