I also recently was sent an article from Nature that was a great analysis of barefoot running.
While I'm writing, I'd like to also give a quick overview of my experience with the Nike Lunarglide+ to date. I've now got about 500km on my current pair, and they're holding out superbly. No local store here carried the shoe, and so with much trepidation - and after reading more reviews and blog postings than I'd like to admit - I finally ordered a pair online. I have to say - the cult-esque following these things get is justified. I'm just blown away by the shoe. It's so light, comfortable and fast - all while offering just the right amount of adaptive support. I only recently became a fan of Nike (with the Vomero) and these shoes have definitely solidified my fan-boy status. If you're in the market for new shoes to round out your fivefinger based training (which is why I assume you're here) - I don't think you can go wrong with the lunarglide+.
More soon...