BODACIOUS  I'd really like to know where Yep is heading. I personally used it as a "nifty database" for ebooks that provided easy and somewhat structured access to manuals, reviews, encyclopedias, etc. If it expands in this direction I think it will fill this "ebook database" market nicely, especially if djvu formats are included. One thing I noticed with ver 1.8 was it's sluggishness, so I'm willing to give 2.0 a try if it improves that. Also, going away from an internal pdf viewer should make supporting other fileformats (djvu for example) much easier and I'd expected this as part of a major upgrade.

I don't necessarily like that Yep is starting to advertise itself as a program that collects various small pdf files, such as receipts, electronic documents, etc. There are other programs out there that already do that job (Paperless for example) and going down this niche route will prevent it from being useful to a whole share of other people.

Again, I believe there are niche markets out there and managing a collection of ebooks is probably the bigger of them. I'm currently also using Papers for journal articles and like it alot, even though it's specialized. I might have to use that for all of my PDFs, depending on where Yep is heading.  
(Version 2.0.0)