Tracer Tricks...
OK, I'll post a couple and, hopefully, others will join in.

AFTER running the bitmap tracer:::

1)CTRL+U (ungroup), CTRL+3 (intersect) ... cheap shot, but sometimes might look good.

2)a)Set nudge to 6+ inches (off the page)
b)CTRL+U (ungroup)
c)Select (marquee) a blob of the shapes. START OUTSIDE THE PAGE. If you are inside the image you will grab something very odd.
d)Nudge right/left/up/down.
e)Repeat throughout image & even in the previously selected blobs (you could go "fractal" here)
f)Select various shapes in various blobs and RIGHT CLICK on a color. Repeat a lot.
g)Reasemble. Since you know the "nudge", this is easy.

Voila - Shapes with outlines.
If the result is less than beautiful, you can always select-all and do no-fill. Then the madness is evident.

Rgds,
tad