I've seen it mentioned somewhere.

I fired up a squeak process on a port and couldn't hit it so I can't tell if its the squeak I just built, the firewall, the image I deployed or what.

Apache, OTOH worked fine. So 80 is open.

One cool thing about squeak - its got a vnc server that exports the main window as a display. Really handy thing. You can turn it on and off from a web page just to look things over.