The latest issue of c't (German computer magazine) has a four page article by yours truly about Mastodon. Thanks to @Gargron, @cwebber, Evan Prodromou, @angristan and everyone else who spoke to me in the last few weeks. We ended up scoping this one pretty tightly around Mastodon from an end user perspective, with a short blurb about the fediverse.
The online version is paywalled, but you can at least see a pretty Mastodon graphic: