The Atari has has programming and sample code for ages now, but other platforms have been catching up slowly. With the advent of the Apple II FujiNet support actually using the FujiNet device in BASIC and other languages has been something only participation in the Discord could expose one to. But no longer- the WIKI has been updated with some nice docs not only explaining the FujiNet Device in AppleII world but example programs and helpful tips.
Check out the Apple Programming Section of the Wiki for more info.