OK, I did it; about 10 minutes ago. The epub support was a big factor, plus I already have a B&N e-book on my computer that's just going to waste. (I hardly ever read books on my PC.) And, yeah, it is pretty.
I want to believe that the PDF support will be valuable, but I suspect it will be like trying to read full page graphic novels on my Kindle. If not, I will be pleasantly surprised!
I told my wife I needed to reward myself as an incentive for giving up tobacco.