Requests to add books to the Library are easy - you just import the ISBN using Import Books in the left navigation. For books that are pre-ISBN you will have to wait a bit longer until we have a feature that will allow you to add those books and magazines.
Blogs is also easy - you vote in our survey on the Community page for the blogs you want added. We have a chart running of the votes.
Magazines is a bit harder. We did run a survey for several months asking which magazines EYB members wanted us to index and that was the basis for the magazines you see listed. We only add magazines when we are going to index them as they have to added manually - entering all the data, tracking down the cover. For books we import all the data and covers from our data suppliers so it doesn't matter how many book requests we add. You can still make requests for magazines by posting a comment on the Blog post Magazine indexing of May 29. You should always be able to see this post by checking Latest comments in the right navigation of the blog page.