This is something I've been thinking about since I found out that White Wolf was going Print on Demand. The hype at the time was that "every book from [their] back-catalogue would become available." Since then I've seen nothing to indicate this is becoming a reality. Until now, that is.
"The PoD catalog currently available on DriveThruRPG is the only stuff they've so far converted to PoD format. Everything which isn't on that list is in the "to do" pile, but depending on the individual book, the availability of original source documents, how easy it is to convert those documents to the proper format, etc., all affect the amount of time it takes to prepare them for PoD. It's a process that takes time, and they've got limited manpower to do it. There's no real way of predicting how long a book will take until they're doing it, so there's no real release schedule. Stuff's ready when it's ready.
Looking at what DriveThruRPG has available in print as per today [link], the list is somewhat dismal. As Watson pointed out in the same post: "Older stuff has been out of print longer, so it's probably got a higher priority for conversion." In practice, this seems to mean that at the moment, unless you're looking for an oWoD-book, you're SOL. I don't know, it seems a little half-assed. If they want to keep people playing their newer lines, they probably should prioritise those, but what do I know. I do know that I want Geist, and I'm not paying the 100 bucks Amazon is asking these days.
Disclaimer: As far as I can tell, Watson is not an employee of WW, nor does he quote an official source. Thus this information, though seemingly accurate, may be considered anecdotal -- a rumour, if you will.
[Picture source: Timothy Bradstrreet]