While I'm also excited and anxious for my case, I realize that a handmade product takes time. These aren't mass produced items that you can get at any store. I'd rather the team take the time to get the cases right than to have it rushed out to me. According to Darin, orders have started trickling out and the flood will happen soon enough. These were never promised to ship before 3/21 (and even then, I would imagine that only those who ordered in the first day or two of pre-orders actually got a case shipped on the first day). I don't think we can get too excited on 3/23, considering there's a queue, Portenzo is perfecting the product, and also producing and releasing other great products.
I put a cheap skin on my iPad to protect it until my case arrives--this sort of wait is, unfortunately, part of the price one pays for being an early technology adopter.
FYI...Darin was on Facebook and I think Twitter yesterday--people may be able to contact him via those routes. He does a lot more than just respond to our messages here at Mac Rumors. He has been quieter these last couple days, but I'm sure that it a reflection of trying to get these cases out to everyone.