Question: How to upload custom map?
Thanks

Alright. Be happy, for I have decided to reply.

I was actually looking for this answer for a long time, so well, I'll explain it to the best of my abilities.

First of all, the map management system changed a LOT on Battle.net 2.0. To begin with, it no longer revolves around peer to peer (Downloading the map from other players.) The maps are in fact, hosted by battle.net, and uploaded by the original map creator.

So the map creator uploads the map to Battle.net, and then you see it on the menu, download it and are able to play it.

If you select "Create game" and have played it before you should be able to play it. However, I am assuming that you are not from the United States (Or don't have the US Version) since that is my situation. I play on the Latin American server and there's only two custom games, so I suppose you are wondering how to PLAY them when they haven't been hosted.

First of all, there's various options you can try. The easiest one is double clicking the map (Thus, opening the editor) and once it's open pressing ctrl+f9 thus, opening the map in Single Player. That way you can play it by yourself.

In case you want to play it with your friends, I am kind of as stuck as you are, but here are some ways you can (I haven't been able to do it though) do it: 1. contact the map creator and ask him for permission to upload his map on your realm. 2. upload it 3. ??? 4. Profit!

The other option, would be using an application which swaps the map, they used these in BETA.

An example of it would be Map Craft This application lets you host a game first, and then you swap it for the custom one in-lobby. However, I have no idea if it works outside of the BETA, as my cache files are different.

Anyhow, I know it's a bit sloppy, but I hope this small "Guide" helped you! Godspeed.