FINALLY !

Bethesda have said they are releasing a mod kit for Fallout 3 very soon. It is called 'The Garden of Eden Creation Kit', also known as G.E.C.K.. It will allow creation and editing of buildings, landscapes, towns, and locations. Also you will be able to edit or write new dialogue, create characters, weapons, creatures, and more stuff ...

The best news over for the Fallout 3 modding community !!