Those who think that self-publishing/sending out a newsletter with dinosaur names is just as good as publishing one's papers in a journal should read the following.
To be fair, the _extended abstracts_ that Nature publishes as "Letters to Nature" usually leave much to be desired, too. Especially if they're not accompanied by ninety-five pages of supplementary information (I took this number from, I think, Turner et al. 2007). And need I even mention the usual quality of Nature photos, both in print and in PDF?
I'm not saying people shouldn't try to publish in Nature (indeed, in some countries like France, they basically _must_); just that Nature papers should be followed by detailed descriptions in more specialized journals with more generous (or no) space restrictions.