I was contacting the NHL Shop today to inquire about the Black Ice Flyers jersey (Customizing them won't be an option....grrr wanted Jagr) and figured I'd ask them when WC jerseys would be available for purchase....
The official response I got:
"Regarding the Winter Classic Jerseys, if you want to see the gear, you can go to each team's gear page. The actual Winter Classic Jerseys won't be available until November."
So it looks like we have another month, at least, until we get a peak at them. But, as far as I'm aware, it's the best estimate that's out there.