nanitozo's image (in post #1048 ) was using something other than the portable/debug scanner to show the steam amount (some addon for Waila/Wawla maybe?)
Oh I should have mentioned that that's WailaNBT.
I'm just reading the mStoredSteam tag and outputting it to waila. Same with mStoredEnergy for EU, and fluids/inventories in pipes.
It's a great aid for debugging.