What Jonathan said really needs to be put up on the D website, maybe under the articles section. Heck, I'd just put a link to that recent UTF thread on the website, it's really informative (the one on UTF and meaning of glyphs, etc). And UTF will only get more important, just like multicore.
Speaking of which, a description on ranges should be put up there as well. There's that article Andrei once wrote, but we should put it on the D site and discuss D's implementation of ranges in more detail. And by 'we' I mean someone who's well versed in ranges. :p