The team behind the Plex media playback package seems to rarely rest, and has most recently pushed an update to the server end of the software. Now up to version 0.9.8 and nearing the lofty 1.0 tag, Plex Media Server is finally offering proper multiuser support, giving each user their own view state. That means your kids can have their own account, for example, with access to only certain silos of content. Even better, the Web, iOS, Android and Roku clients are already prepared for this, and the others are getting updates soon, although it's currently only enabled for PlexPass subscribers. Also new is a "now playing" status which carries more importance thanks to the previously mentioned multiuser feature, all viewable through Plex/Web or accessible via the API. The last major change is that it can create video index file that drops in thumbnails for each section of a video. That enables image previews while navigating on the Roku, and thumbnails of progress in that new now playing feature.
On the client end, the Plex blog highlighted an interesting project called PlexConnect which runs on the Apple TV. While that's not new by itself, the twist here is that it works on Apple TV second and even third generation boxes without the need for a jailbreak. This bit of magic is apparently achieved by spoofing Apple's Trailer app, which means it requires firmware 5.0 or higher to work. It doesn't have all the features of other clients (yet) and it will require a bit of Terminal know-how to get running, but there's plenty of information in the wiki to get you started.