The straightforward port by Boris Shingarov is actually just a small patch for Jan Piumarta's UNIX port. Networking works, but you need an X server to run the UI.
Cheese by Boris Shingarov. This is not really a port of Squeak, but a different environment based on native PM widgets (no BitBlt whatsoever). It is very incomplete, and should only be viewed as a proof-of-concept. Don't expect it to have networking or sound.
Boris is no longer maintaining his OS/2 port or Cheese.