I sent them an e-mail shortly after posting my last comment and here's the response I got.
Thanks for your order and your email!
This is the bad news, however:
We've encountered some pretty significant delays that are going to prohibit us from shipping out your AirMail sleeve for another two weeks. This is the bad news, however:
We're not a big business, or even a small business; we're just two people working as hard as we can to get this insanely overwhelming project fully realized and on your doorstep. We never expected to be on every blog on the internet and to sell thousands of sleeves to nice people like you all around the world! But that's the reality and we're going to work ourselves to the bone make this cool thing for you.
We sent out a big email with this news to all the pre-orderers on Saturday -- maybe it ended up in your junk folder?
Sit tight and we'll make you smile. If you'd like to cancel your order, just reply to this email and let us know.
Best,
Jona & Claire
I checked my junk folder and didn't see the e-mail they sent out to preorders. Did anyone else get this message?