Zinio released an updated version of their Magazine Reader. It's much improved over 2.0. One of the things I actually do religiously with my Tablet PC is read PC Magazine in Tablet mode. I can't tell you how cool it is to sit there and read the magazine, like on an airplane, or in bed. It's one of the few times I use my tablet in portrait mode.
I do still wish that Zinio used ClearType rather than Adobe's "Blurry Type" technology.