Firstly, Atari is to acquire AtariAge, which you could call a retro forum though that would vastly undersell what it is: over time this has grown into the best repository for everything Atari (as well as some other companies), both hardware and software, as well as being a major publisher for homebrew software.
“Atari is now taking its retro-related IP seriously and is creating a wide array of hardware and software based on that IP, while also creating new, original content,” said the site’s founder Albert Yarusso. "[…] Atari, for the first time in years, is targeting and embracing enthusiasts like ourselves, while also making products that appeal to those who grew up with Atari and have a fond nostalgia of the brand, but aren’t steeped in retro gaming as we are.
From a hardware perspective, that’s been true since just after the 1983 crash, when it was sold to Jack Tramiel’s company – even before the Lynx and Jaguar. The software side was split into Atari games which has an even longer history of being passed around.