If anyone is interested the latest version of ATTAC has JUST become available. It is version 4 and it is in Beta so some features are not working yet, however the REXX engine is fully functional so ZOC scripts will run. For the Penguins lovers out there Version 4 is available in Linux as well as Windooze.
Here is the URL if you are interested:
http://www.tw-attac.com/index.html