Unfortunately these guys are already sold out (though maybe there'll be more soon), but I'm still posting them here just to gaze on their awesomeness -- Etsy user Rabbitrampage put together these six iPhone icon keychains (well, five iPhone and one Finder) out of felt, thread, and fiber fill. I think they look great, though it would be nice to have even more custom icons available. I guess if you want a special icon keychain made of your own app (ahem), you'll have to make it yourself.
This same Etsy user also enjoys wrapping your iPhone in felt recreations of old retro items like Game Boys and even a VHS tape. I've already got a case on my iPhone, but if I didn't have one yet, I'd definitely pick up one of these.