Love this forum, I've been visiting it every few days for the last half year or so.
I'm not much of an artist but I'm a pretty decent software engineer.

So I was wondering, is there any mapping software (in the widest sense possible) that doesn't exist yet, or that exists in a really crappy or really overpriced form?

I've got some ideas in my head but since I'm not an awesome map maker like many guys here, I don't really know the market well.

Any ideas for what needs building?