My advice to those of you who are looking to build up readership over at BN: play with your search terms. Search result rankings are pretty much everything, but if you're able to get on the first page of a popular genre you are going to be getting some major help. That said, it's not like there's a specific SEO term that will work. Adding "Thrillers" won't necessarily get you onto the page for thrillers, for example. Just keep playing with the search keywords in the edit your book page.
There is a nookboards, and I have found readers there. Haven't been in a while though.
In case anyone cares to read more, I'll also say that it took a loooong time to get momentum at BN in the first place. Pubit opened in October and I had 16 sales for the month. 15 for November. It can take time, and of course what you're writing matters, but lots of people report miraculous increases in sales once the system finds them.