generators .... under the sarcofag. you remember, they said you can explore new areas. well generators level was planned in shoc too, but they cut it from shoc too
probably it was the engine room or anything. you can find it in shoc game levles .ltx files, and also in clear sky. also in clear sky you can find dialogs for that level, and sounds :S
about lab under hospital: they said last summer, that there will be lab under the hospital, so you need to go down there, and find something
abou lab under limansk: i dont know, i just saw at ol.de forum, that they said it was cut...
military ordnance yard is still on deepsilver's site they should correct it...