I've been very scatterbrained recently, however I have the layouts of several maps figured out and put together. I just need to do detailing and scripting on them now. The custom story itself should only be one or two hours long by my estimate, but it could well be longer depending on where I go with it.
I'm very excited with what I have so far and I look forward to progressing farther with the idea.
On an unrelated note, I turned twenty last Tuesday.