Heya. Welcome to the Guild! Having just done a detailed interior map I am very impressed with the folks that can create nice top-view objects. I spent a lot of time trying to create or find restrictionless stuff to drop into it. You just want to make objects I'm sure you'll find folks around here to use them...you want to make maps I think we can help you out with that part too! Dundjinni is pretty cool, but I think Photoshop might open some new doors for your mapping efforts.
M