I finally finished the Map Editor. If you want to help me testing it, feel free to download the installer:
http://www.aksdb.org/downloads/MulEditor_0-6.exe
Just to give you a look at what is waiting for you, here is a screenshot:
I hope you have fun testing it and building your maps

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RunUO RemoteAdmin - Control your shard remotely and keep an eye on the page queue
MulEditor - Modify gump, art, tiledata, multimap, localization files and
map/statics.
CentrED - A Client/Server based
multi-user map editor.