Hi.
1. I only know of gradaute employment statistics for the economics and business faculty which can found on their website
http://www.econ.usyd.edu.au/content.php?pageid=1334. Note that they are stats from 2002.
and as Zarathustra said the University good guide has a more comprensive and up to date set of stats.
2. There are no students forums that i am aware of. However once blackboard is activated fo your units then most have message boards where you can ask questions
Also if you log onto your usyd mail, at the top taskbar their is a tab that says 'BBS' which is the usyd bulletin board. Click that and you buy sell things, ask about sport and subjects etc