I stand by my previous comment on the deMotivational Posters thread you made before...awesome stuff!
Right now I work in an open office so there is thankfully little artwork, but they do have inspirational quotes around on the walls. Most come from Quality Improvement experts like Deming and Juran since the organization focuses on improving healthcare quality.
I guess the only thing I can say is years ago when I worked at Peter Norton Computing we had some awesome artwork in our offices. We had some David Hockney work that was great to look at. Peter was a modern art collector.
But ever since then I've had to use my own U/W photography (if allowed) to color the walls of my cube over the years.
I find HR departments very odd, why are they so delusional about such stuff that the openly throw out such propaganda ?
I would just prefer they select art that makes it a pleasant place, HR departments can also be very arrogant, the main reason I like being a contractor. Twice I have threatened HR groups with legal action, often they don't seem to know labour laws or even common law.