Small contribution to the cause on my part... since I haven't found a keybind guide for newbs like me I went ahead and took notes during the 2 part youtube tutorial video (worth the watch, btw) and figured out a few that weren't covered that seemed to help a lot (chat commands in particular).. this is not exhaustive but should get most of you started if you haven't played yet:
General Commands
, = open purchase windows (vehicles/weapons/etc..) - only in a hangar/base
u = Team Chat
y = Global Chat
right ctrl = donate C-bills to team
Battle Armor / Infantry Commands
1-3 or mousewheel = select weapon (1 and 2 are guns, 3 is your always equipped SRM pack)
G = throw grenade
H = swap grenade type
Space = jump/jetpack
Left click = shoot current weapon
Right click = pick up dropped weapon
Vehicle Interaction
f = enter/exit vehicle (if you exit a vehicle without power off it can be taken by another player on either team)
p = power up/down (power down to repair in a hangar or when exiting vehicles in the field)
W/S = speed up / slow down
A/D = move vehicle left / right (mouse direction rotates waist/turret)
C = coolant flush
O = emergency shutdown override
\ = bind or unbind weapons
Left Mouse = fire weapon group 1
Right Mouse = fire weapon group 2
Center Mouse = fire weapon group 3
Radar, Targeting and View mode (vehicle only)
r = toggle radar between active/passive
z = camera zoom
i = toggle night vision
e = target closest enemy
t = cycle all targets in range
q = switch target to current crosshairs