Wedding guest book alternatives guests actually enjoy

A traditional guest book usually ends up in a drawer. Alternatives that end up on a wall or in daily use:

A star map with a wide mat for signatures
Print the sky over your venue on the wedding date with a wide white border or mat, and let guests sign around it. Order it before the wedding using the planned date and time; frame it after. From $14.99 at myskykept.com. See your sky free →
A polaroid guest book
Guests add a photo and a line.
A puzzle
Each guest signs a piece; assemble it on your first anniversary.
A signed wooden heart or drop box
Guests sign a slice; it sits on a shelf.
A vinyl record or globe
Signatures on something meaningful.
Date-night jar
Guests write date ideas for your first year.
Audio guest book
A vintage phone guests leave voice messages on.

Tip: Leave good pens (fine-tip permanent markers) and a sample signature so guests know where to write.

Questions

Print it with a wide border or use a wide mat in the frame; guests sign the border with a fine permanent pen.

Yes — use the planned date, time and venue.