Could you have a script written in ZIWE to take each post and then import it into a Twiki table/file? Have it so that someone with Admin status can review a post, and hit an "Export" button that only they can see which can move the whole post or thread into a Twiki area? Just a thought.
After all, you don't want everything moved to Twiki, right?
Dual Citizenship of account names will not work, as Twiki will not accept some of the account names used here in ZIWE. For example, Cable4096 verses CaBle, and yes the "B" had to be capitalized or else it would not take it. The name, was given as "Ca Ble" as "Cable" was not acceptable. We should be able to use handles, right?