DownloadForOS2

There are three flavours of Squeak that you can try on OS/2.

The port by JuanManuelVuletich (SqueakPorts) at http://www.sugarweb.com/squeak/ports/os2native/OS2English.htm using DIVE. The advantage of using this port is that you don't need to customize OS/2 in order to run it. Sound and networking are supported.
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 completely different environment based on native PM widgets (no BitBlt whatsoever). It is very incomplete, though (again, no network).