> Does anyone know where I can find one of those "image code generators"
> that verifies that a person is submitting a form and not a computer?
Not me.

> I'd rather not stop to recreate the wheel.
Sensible enough, but if you find you have to, here's one pseudoapproach
I've never tried that could work:

. programmatically generate the xml text for an SVG image
  (the images themselves don't look all that complex, and the key text
overlaid is just text at this point)

. convert the svg to some binary web image format like png (e.g., via
cocoon)

Cheers, 
Steve

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