Check out The lily Nook. http://www.lilynook.mb.ca/

They are a Canadian company and offer many lilies suitable for colder areas. They also have a number of links (under their "articles&info" link) where there is some discussion on cold hardiness issues. They have articles on Orienpets suitable for cold climates, (Scheherezade is an Orienpet), and Longiflorum hybrids.

-Helen

Here is a link that might be useful: Orienpets for Cold Climates

Hello, sjmarq.
I usually hang out on the Far North forum but saw your post and thought I would reply.
Given a link to a Lily thread on the FN forum - that might be helpful. The list of lilies that the posters on that thread are growing seems endless! Should give you an idea of what's hardy anyway.
Lilies seem to be thriving in my garden - including Golden Stargazer, White Stargazer, Casablanca, Monte Negro, Lollipop (those are the ones that I can remember off the top of my head).....they aren't blooming quite yet; probably within the week.
Hope this helps.
Margaret

Here is a link that might be useful: Lily Thread