Excuse me if I disturb you with my own problems. Looks like everyone is comfortable with undetermined boolean values.
Is it just me or there is no way to tell if the "checkbox was in the form and was not checked" vs "checkbox was not present in the form", browsers give identical requests in both cases. Most of the web frameworks I have seen seem to add a hidden field for such checkboxes that indicates whether there was a checkbox in the form being submitted. Which I am afraid you can only do on your own with hunchentoot.
Ignas