Preorders will be open until the end of the day, midnight EST on Friday, March 26th. I am aiming to have these shipped by May, and will be selling some extras once preorders have been delivered.
The site had some congestion issues this morning; thank you for your patience! I will be moving to a better server after these order are finished. Additionally, a couple of orders were unintentionally cancelled by the server because of the load; if the payment has been reversed on your cards, this is most likely why.
Please feel free to contact me on twitter @seofim if you have any questions or issues; I will respond more quickly there!