Yesterday, I mentioned the Canon 10D has negligible current draw when
"on", but not doing anything, and suggested most cameras are the
same.  When I got home, I wondered about the 1D2 ... so I sacrificed
the wall-wart power gizmo that came with the camera to the gods (I'd
never used it in almost two years, and have another for my DCB
stuff).  Measurements with a Canon 1DMkII with EF 500/4 IS affixed,
powered by a 13.8V 35A power supply through the above cable:

power switch off:  19mA

(!) This is somewhat difficult to explain, and almost certainly wrong
since the camera battery lasts longer than the ~3 days it would drain
at that rate.  But that's what the meter said.  (Yes, the meter
dropped to exacly zero when I turn off the P/S.  Bizarre.)

power on,

  idle  19mA (just sitting there, no back or top display, etc)

See above:  this can't possibly be right, but the Fluke 189 said
electrons were flowing and who are we to question Fluke?

  wait  50mA (back and top display on)

  AE 205mA (half-press of shutter)

Evaluative metering.  The number was independent of exposure mode and
other stuff.

  AE wait 170mA (release half-shutter)

this state lasts a few seconds then reverts to "wait", above.

  AE+IS 214mA (note the minimal extra draw due to IS)

Madly shaking the camera around didn't change this number.

  AF+AE 333mA (focus racking in and out, peak current)

Typical is about 320mA.

  preview, active 286mA (varies with intensity)

"Active" in the sense you have a finger on a button.

  preview, idle 182mA

"Idle" being no buttons are being pressed.  This lasts until the
preview shuts down due to lack of input.

  preview, image selecting 442mA (peak)

Obtained by madly cycling through images.  More a measure of card
access than anything else.

  8fps firing  1.35A (peak)

A very high current, but the spike is brief.  Some day I'll get a
fancy scope...