If you and your fiance have decided that you don't really need the traditional household gifts you'd expect to find on a wedding registry, consider registering for experience gifts.
I've seen an increase in experience gifts where you and your fiance are gifted everything from massages to cooking classes.
There are several websites that offers service as well as product gifts such as newlywish.com and with companies like registry360.com and wishpot.com that allow you to create one registry from items you find all over the web it's easier than ever to create your dream wedding registry!
I will however add that there will be some traditionalists on your wedding guest list and they will want to gift you those traditional items - linens, pots/pans, kitchen gadgets, etc... - so you may want to add some of these items to your registry too. You might as well upgrade the items you already have with the latest versions of them!