Hi,
the successor for MQWF is indeed WebSphere Process Server (WPS).
Although there already exist some tools and recommendations how to move
from MQWF to WPS, this issue is still under construction.
If your bussiness does allow it, leave old implementations on MQWF and
start
new projects on WPS.
Support for MQWF 3.6 will still be available for a couple of years.
Volker Hoss
IBM WebSphere Process Server Development