A member of the WoW Ladies livejournal group, Tsuraibara, and her husband figured out a completely awesome way for them to customize their wedding rings. Since they "met on an online game, the engraving was free, [and] 'soulbound' sounds nice even if you aren't familiar with WoW," they actually went out and got "Soulbound" carved on the inside of each of the rings. That's great!
I liked the plush Shammy a lot, but I think this might be my new favorite real life WoW item. Of course, this does mean that they won't be able to put these on the AH anymore. But if for some reason an upgrade drops (maybe on a wedding anniversary), a vendor could probably offer them a few gold at least.