Simple pixelation of faces for anonymity?

Followups set to alt.graphics.photoshop

Our social service organization is trying out Picasa and Hello, which work
well together for our purposes. However, some of our photographs invariably
include people we're not authorized to include if the images go beyond
internal use. I'm thinking of crowd shots -- 20 people in a picture and
there's one whose image just can't "go public," for legal reasons -- but
someone wants to use the picture.

Most image editing software provides methods which would work to obscure
identity by pixelating or blurring facial features. However, since Picasa
might be a one-stop shop for most of our people (it's editing features are
adequate with this single exception), we don't want to deploy anything in
the general photo editing software dept.

I'm looking for a darned simple application that a user could dash into,
fuzz a face with a few clicks, and dash out of again.

Anything like that in the market?

--

Scott