In case you're looking for more ways to let strangers know immediately that you are a geek, I offer you the apple command key ring.

 

Yes, it's a ring made out of a faux apple command key. I'm really trying to imagine a context in which this wouldn't make you look like a huge nerd, except maybe MacWorld, but if you're at MacWorld you already look like a huge nerd so... I'm struggling with that tautology. At least with a $4 pricetag, it's not a huge commitment or anything.

You can look for them on Etsy, but since people have found out about this great invention they appear to be sold out at the moment. Shucks!