UPDATE: Second transaction finally came through about 2 hours ago. Crises averted.
Still stuck at 0 conf, but that sort of thing I'm used to. Which is kinda sad, IMO. We really need to do something about that.
Nice to know that bitmixer comes through yet again. Personally I have usedthem for a few times with my coin mixing and never have had any problems with them, whatsoever. They use a pretty decent fee for payouts from their end i think, so i don't think you need to worry. If the transaction doesn't confirm for a few days then just email their customer support which should be pretty responsive.
Good luck!