For the cage, use the stocks to dump all weapons/shields off the goblins to get the most bang for your buck. If you're just killing them, d-b-d the cage stockpile then go back over with k to undump the actual cages. If the cage is built, use t to undump the cages. It doesn't matter if the cage is built first or not, they'll still take the items away.
No, crutches don't work. My broken leg dwarf still lays in bed.
For finding your fortress in adventure mode, your best bet is embarking in the civilization that is the closest to your fort and finding your way from there. There is no easy way that I know of :/
Glass is still pretty random, although it seems to be more useless to wood. I'll let you know when someone loses a limb to it.
I don't know about the bees, but if they're inside they should survive. Toady can't be that cruel :p
Magma uses Archimede's screw, which goes with pressure from one side to the other. The easiest way to look at this is that fluid has weight, and dwarves can only pump the liquid if the side they're pumping to has less weight than the side they're draining from. Fortunately for you, it's a one sided equation so the pump will never back up or overflow....unless of course that was what you wanted O.o
I had a question too, but I forgots it
Oh ya, underground soil layers don't need to be watered, but underground rock layers do. Anyone know about clay layers?
What's the best thing to do with zinc? Seeing as it's my only metal, I want to make the best of it.