Welcome to the forums though needhelpnow! Just to orient you a bit:
Bugs & RFE's (requests for enhancements) can be filed/voted for in
Bugzilla & tracked (see priorities & what release their going into) via
PMweb.
A good doc to checkout is:
Open Source Product Management: How do features get into Zimbra?
(The
blog lots of good articles)
Last but definitely not least - the
Wiki has all sorts of collective knowledge in it
