Mk 2 Things to remember.

Things I looked up after the action today (see Geektactica). Plus some more interesting rules.

Models which cannot make a normal ranged attack on a target cannot add to the unit's combined ranged attack. Pg. 32 Combined Ranged Attacks P3

Friendly models knocked down by a player on his turn cannot stand up that turn even if they have not activated this turn. Pg. 33 Knockdown P2

No matter what if a model cannot draw Los to a model it cannot hit it with a spray.
Pg. 30 Spray attacks P5

If a Warjack has a special attack which uses a Arm or weapon system and that arm gets crippled you cannot use that special attack. Pg. 35 Crippling Systems P5

You get free strikes if your target(s) leave your melee threat range or los, so no moving around to the back to engage other stuff without free strikes. P21 Free strikes

Melee attacks need range and los. Los could be line from base to base (old way) or line to cylinder from cylinder but if there is a cylinder of the same height(targets height) within 1" of your target (screening) and between you and your target you cannot attack it. P2b Line of Sight. (April 10th)

Well that's all for now If I find anything more on the forums I'll update this as I go but only if I can find the rules myself in the PDF.