[Zope] Python 3 support in any Zope Toolkit version or fork

Hi all, I have a Python3 web application that I am considering porting to Zope Toolkit. Currently I am handling all the web connections in low-level Python. However, Python3 is a hard requirement. Are there any Zope Toolkit versions or forks which are Python3 compatible? What are the major stumbling blocks to porting, other than syntax? I've googled the subject a bit but I've found no details on the subject presented by anybody associated with the project. Thank you! -- Dotan Cohen http://gibberish.co.il http://what-is-what.com