Many of the memorable wedding ideas I have come across are really simple or inexpensive. It's lovely to put your own personal stamp on some of the details you choose.
I also notice a trend towards having mis-matched items within a particular theme. This works very well with bridesmaids dresses or any sort of vintage style. These table number settings caught my eye on StyleMePretty.com - (Photo courtesy of cunninhamphotoartists.com)
Or how about having table linen embroidered with your own monograms? These beauties are hand-made by Irish designer Charlotte MacDonald. See more of her work here or visit her own blog.