[Zope] Threading gotchas?

I'm just about to do some threading in a Zope application. At the moment it relies on an external cron job or Xron to call a method reasonably regularly but I would like to use a Python thread instead. I'm not particularly bothered if the thread is called slightly late. I'm just wondering if there are any particular gotchas? Or will it work just as it does in ordinary Python? Andrew