Extra Hardware Serial ports on Mega board

So my shiny new Mega board showed up yesterday, and I started to play around with it. I want to take advantage of the three additional UARTs, but I'm not sure how to use them, as, according to the docs, the serial functions don't seem to take a additional argument for which UART you want to work on. Does anyone know how to address the additional lines?

Thanks

Just put a 1 2 or 3 to the name of the serial function to use the extra ports. Like:- Serial.begin1(rate);

Awesome, thanks! Is that documented anywhere? I couldn't find it.

It was mentioned [u]here[/u] but I don't think the formal reference documentation has been posted yet.