Table numbers with a date & pictures of the bride & groom during that year
rustic seating table plan, image by http://lauramccluskeyphotography.com/
Rustic wedding escort card display with kraft paper and moss
Escort card display. Probably best for small weddings...
Photo seating plan
A lovely idea for a seating plan that uses photos of all the guests pinned using mini clothes pegs. More photo seating plans at http://www.toptableplanner.com/blog/happy-memories-wedding-table-plan