There is also the Lattice from Innoversal, but it will probably use the same PixelQi screen as the Adam (neither of which should be glossy and will read just fine in the sun in reflective mode.)
Dulin's Books
speculated there could be a Qualcom Mirasol announcement soon. That one may have the best high-res potential (as much as any as yet unreleased product does.) The screen looks kinda glossy but the video of text in the sun is still readable.
artifact
Still waiting on a reader for cookbooks and gardening (oh the dream of going to the nursery with my library in hand!)