Unlined and unmarked fingerboards seem to be very traditional. A option for side dot markers is to place them where the frets would be (if it were a fretted) instead of inbetween the frets like on a freted neck. I placed mine right on frets 1, 3, 5, 7, 9, 12, 15, 17, 19 and it has really helped me find the note I'm looking for quickly. Side dot option on the fretlines is usually custom in most shops - you don't see many side dots placed like in those positions.
Personally - I wouldn't do anything to the fingerboard face as far as markings go - I would leave it unlined and unmarked.