Since the rules might get lost in the "How awesome Dark Eldar are" thread (which they are!) I thought it might behoove us to start a new thread simply for the collected rules floating around during Games Day and afterward. Here's what I've seen so far:
From Sildani @ Warseer
Ravagers only AV 11 11 10 but can fire all three dark lances at cruising speed (couple that with fast and... I need to read my rulebook again, but I think it should allow them to go 12" and fire all three weapons, bye bye land raider).
There were several upgrades for reaver jetbikes that inflict different numbers of S3/4/6 hits on units when doing their 'drive by' attack. There was half a page of description about this, so I can't remember the details.
The DE seem to have an armywide Acute Senses rule.
The pyramid thing the Archon is holding might be a wargear item that doubles his Strength IF he kills an enemy MC/SC in close combat.
The rumored rule where the DE get stronger as they kill the enemy is called Strength Through Pain.
Phil Kelly said Wyches were Troops.
Ten Wyches to a box, six females(!) and four males.
Two female Reaver jetbike torsos on the sprue.
Drazhar is in the Codex.
There's a section in the Background part of the Codex called the Coming/Advent/Rise (forget which) of Vect.
And regarding Reaver Jetbikes:
They appear to have some hit and run attacks where they pass a unit inflicting damage without entering combat. Still only a T4, 5+ armour value, and can turbo boost 36".