How do you make them?
By hand! We take real ceramicist-grade clay and create nice-sized tablets. We carefully translate your message, inscribe the cuneiform characters, and wait for them to dry. Then we fire the tablets to make the clay harden, and last longer.
"Some tweets should live forever. We'll convert it to a cuneiform tablet and send it to you in the mail."
Tags: pranks, retrocomputing, www
What a ripoff. Their FAQ says your message is not actually translated into ancient Persian. They merely phonetically render your tweet in the cuneiform alphabet.
Humph. If I was going to spring for this, I'd rather pay twice as much for an actual translation of my tweet into ancient Persian or Babylonian.
So what did the ancient Persians and Babylonians use to mark off a hashtag?
Well, the octothorpe finds its origins in the mark for "pound", as in weight, so I'm sure they had some symbol or contraction they used to measure weights.
How much would you pay for Hittite?
Maybe for a very memorable tweet they'll carve in ancient Hebrew on stone tablets.
There are only ten (10) slots available for early backers, but it's likely that a backup set will be collated with slightly different tweets -- such is life when you're searching Twitter for history.