Actually, we have a daily blog from customer service that gives exactly these updates as product ships out the door.
https://forums.butterflylabs.com/blog.php
This is nice, I've spent lots of time trying to find where to get the latest updates from BFL.. finally, this might be it!!
... I'm a bit sarcastic there.. Seriously speaking, I think it's REALLY hard to find the latest info about the pre-orders, shipping dates, how production is progressing etc. I thought this forum and BFL forum was the places that had quickest update but maybe this blog has more fresh info. My problem is that I find nothing "official" about this from BFL unfortunately. Like, put up a link on front page saying "Latest info" or something, piece o' cake.
I've found that if you check the forums for new posts or look for posts from BFL_Josh on their forums, you can get the latest info pretty easily.