[Update: Ivan, in the comments, found the original Keyspan driver page.]
It’s true. Above is the page I landed on when I tried my own hyperlink. The page where Keyspan kept its USA-28x adapter driver was gone.
Keyspan USB adapters are considered the best in connecting your Newton MessagePad or eMate to Mac OS X. After a quick driver install, you can plug your Newton’s serial cable in one end of the Keyspan adapter, then plug in the adapter into your OS X Mac, and boom – full connection. If Newton users can’t find the Keyspan drivers, they can’t use the adapter.
The big deal is Newton users struggling to find what they’re looking for.