GeoPat has already discussed this with some of you in-game...
We haven't picked which server yet, but it will be findable in the game browser with enough refreshing. Also, it will start with WAW just as with the name for the regular public server.
The custom maps can be found at: http://www.bfewaw.co.uk/maps/battles/wawfh2event/
We'll see how it goes. We don't want to split the gamers that show up between the two servers, so we probably won't enable the custom maps server until once we have played a few rounds on the stock FH2 maps. We also will see what people think about a switch on game day.
Please leave comments about this here if you want.