Actualy, the OP indeed means
http://www.deltashop.com/ and if you access it from
http://www.delta.com/ when you're logged into your SkyMiles account, you get a slightly different version of the store that allows you to purchase additional items, such as medallion (in my case, Silver, Gold, Platinum, and Million Miler) luggage tags.
I've actually thought of purchasing a couple of the luggage tags because they look a bit sharper than the flimsy plastic ones we get and they don't seem to be too outlandishly priced (and they'd go well with my Concorde sterling silver luggage tags

), but I'm too lazy to have actually dona anything about it yet.
If they had a decent passport cover, like the nice Tumi passport cover I currently have (it's just the size of a US passport, and holds just my passport and my WHO immunization record), I'd probably get one of those. Also, if they had a nice leather ticket jacket-sized ticket jacket, I'd probably get one of those, since ticket jackets have gone the way of the Caribbean Monk Seal