My experience with Treefrog has been a 1 to 2 week turn around once Martin says they are shipping. If you haven't seen it in 2 weeks, you might want to send Martin an email. He's top notch about replying and service all way round.
There is no 2nd printing. I would venture Martin just hasn't updated his site to change the pre-order link to a regular order link (and there isn't any actual difference in this case). Each run from Treefrog is only 1500 copies. Once they run out, they will be only available from other publishers that are handling the reprints.
Got my copy on Monday. If I remember correctly in the email they mentioned scheduled drop off dates. I got that email about three days after I ordered the game. SO if you don't get it soon email him back.