Same experience for me. I have a trip next week...booked ICN-HAN using SkyMiles and can't access the reservation through the VN site. I called Delta yesterday and they gave me the VN PNR, which still gets me nowhere on the VN website. The Delta agent checked herself, and called the partner desk to confirm that it was the correct PNR, but no luck. I tried to explain the email address concept (from above) over the phone but just gave up.

Yesterday afternoon I emailed VN at [email protected] and provided as much information as possible. They responded in about two hours and confirmed that they see the itinerary on their side, assigned seats, and sent confirmation email. But still no luck with their website.

I figure we'll be fine now that I've heard from the VN side that the tickets are confirmed and seats are selected. I'm sure that connections desk you pass right after deplaning in ICN will be able to sort out boarding passes.