When I create a formula field, the only return types available to me are Currency, Date, Date/Time, Number, Percent, & Text.

Why no True/False (checkbox) type? (Or for that matter, why no email, phone, or URL types?)

I've been creating number fields with values of 1 or 0, but that is far from ideal, especially, because they display on reports as "1.00" or "0.00".

Is there a better workaround?