you could add some fish to your water reclamation tank for a small aquaponics system. Grow a few plants to feed the fish and this forms a closed system. There is no need to fertilize, the fish do it for you! Permaculture at its finest!
Framed cork display that acts as a guestbook! What a great, inexpensive idea! Collect corks from local wineries and have your guests sign a cork on their way to your reception. Would look great hanging up in your home after the wedding!