Oooh...you could use the cheapest frosted window film and 'nique it up with cutouts. Cool!
Make sure to use plenty of application spray! This blog has entertaining step-by-step instructions for adding Gila privacy film to a bathroom window. Via Young House Love
Frosted window film with decorative border. Thinking of this for the kitchen cupboard.
Birch tree privacy glass
Frosted Clear Squares Patterned Window Film offers 40% Off, for privacy and enhancement of plain clear glass to a contemporary attractive chic finish. The privacy finish pattern has an easy wipe clean surface.
Specialised range of window treatments. Leadlights, stained glass, sandblasting, window tint & frosted film applications. Residential & Commercial clients.
Front door and sidelight with privacy frosted film on glass by Trisha Murray, via Flickr