They're up to 5500 ebooks now. :)
I'm maxed out on my requests (they allow 15 at one time) so I can get some of the more popular titles. I've also got over 400 books tagged for my wish list so that evey time I finish a book I can just browse that list to see what's available and what I'm in the mood for next. At this rate, with HCL adding books faster than I can read them, I just may never need to actually purchase any books for my nook!