Yeah, there are currently a ton of great ebook apps like Kindle and other ones for viewing documents like PDFs, and I'm sure an iPad optimised version is coming

Yeah, there are currently a ton of great ebook apps like Kindle and other ones for viewing documents like PDFs, and I'm sure an iPad optimised version is coming soon from the majority of them. I don't think we need to worry about iBooks DRM. The only real problem is the software/app issue in my opinion, but jailbreaking somewhat solves that for people tech-savvy enough to do it.