We built EditionGuard to make it easier for self-publishers to get going online by easily setup an eBook sales mechanism. DRM is also a big deal in this industry, so Adobe's DRM is used at the core. Other DRM schemes (and no DRM) are also planned. As this is my first hunt and I wanted to share it as it's what I know best being my product, though I have tons of other tools I wanna share over the next weeks. Hope it helps someone. :)
Zask