The Samsung Galaxy Note8 is going to have a dual-SIM version. Not unexpected, but still nice to get some confirmation, which in this case comes from a support page on Samsung.com that went up too early.
The page lists model number SM-N950F/DS, which should be the Exynos-powered version of the Note8 (F models usually are). The page was on the Austrian sub-site, so this model is for Europe. The card slot arrangement is not yet clear, though the Galaxy S8+ uses a hybrid slot exclusively.
The US version of the Galaxy Note8 could launch as soon as 10 days from now. That will likely be Snapdragon-based and single-SIM only, though.