I noticed that PNAS website contains the section for the so-called "nonresearch articles" (original orthography is retained), otherwise referred to as "collected articles": http://www.pnas.org/site/misc/collectedpapers.xhtml. Upon a brief look at the section and its categories, it seems that articles published there range from "core concepts" articles (somewhat similar to a brief Wikipedia article) to a topic or field review articles and beyond (papers, based on symposiums and other events).
My question is twofold:
what is the level of acceptance, if known, for articles, targeting the above-mentioned section;
what is the scientific, academic and career value of publishing in that PNAS' section (in other words, is it worth considering targeting this outlet [particularly, for a beginning researcher])?