Bay 12 Games Forum

Trebs are huge, need massive headroom for their beams, take ages to unpack, require many engineers and only fire in a reasonably high arc.  They are also damn dangerous (to fling a decent size stone you need a few tonnes of counterweight in a wooden box that can survive the repeated pounding).  Smaller versions like staff slings (its a pole with a type of leather pouch at the end you put a big stone in, throw the stone by whipping the pole forward like a fishing rod, used in many pesant revolts to some success) might be good.
Giant seige onagers and towers might be nice but they are just so much work, if you wanted to send one out in the new game you would probably need oxen to pull the damn stuff, metal fittings, seige ammo, piles of wood etc. mining and countermining is more traditional anyway.

Why worry so much about the big stuff? a pick (or hammer) could be used to smash down doors, goblin mechanics could render traps useless and goblin shield masters could be given seige shields to soak up arrow fire.  The giant crossbow idea is good but it would have to be limited to LOS (unless the glassworks could whip something up?). just giving the goblins acess to a few creatures like harpies would make things a bit differnt.
The goblins useing kolbold POWs as trap wreckers could be a laugh as well.

I think that a priest noble might be the way to go, get him into some sort of mood and then have him grab a statue and swear at it until it does what he says

Why? what do you mean why?! so the pointy eared whinging little gits in the rope reed pantaloons can be set to skull hauling, trap cleaning, blood wiping, giant Tiger cageing and hauling the kids around in a cart or even better rich dwarves could buy them to serve there prison sentances and punishments for them, thats almost sensible enough in a totaly mad way to fit in with dwarvern justice.  OR you could dump your pows into a big pit and toss them bones and refuse for them to turn into crafts to pay off their ransoms.

Im a seige dwarf at heart, I take a proficient engineer with me on any map that has enough trees, any dwarf that gets a legendy of a mood is pressed to mining, once they are double leg, they are introduced to my mobile training catapults (Quality seige parts go to defence) move the training engine to wherever you want to tidy up a bit and soon you will have a lot less stone and 3 or 4 triple legendarys, who will haul like drunken bearded fiends and toss more big lumps of unhappy at next batch of skinny green kiddy snatchers that roll over the horizion. (Yes its bugged but not totally, I killed 3 goblins including a axelord and wounded another with one shot and with 4 well made catapults at the gate the lads at least get to have a few shots at em)

Killing goblins has always just been a bonus for me.  One elf skull totem warms the cockles of my heart more than 50 bins of goblin bone hats.  I figure the goblin/dwarf thing is more soccer hooligan style, get a bit liquered up get the lads togeather and go crack some heads, a good time is had by all.  
The elves on the other hand......
Unlike the humans they dont have anything I want, they dont have enough metal underpants to make me respect them and the pointy eared bastards make random demands and threats everytime I decied I want another 200 barrels of kitten.
Elves are nothing but vermin in ropereed loincloths and need to be treated as such.

If you really wanted the whole dwarf mmo experiance you would have to start of as a lone dwarf, mine/fight for a bit to build up a posse of dwarf followers whose labour you could hire out to fortresses, get rights to build a hole in the ground somewhere (with bugger all minerals) to use as a base camp, then get the rights to strike out and build a new dwarf city somewhere else.
One of the big problems is there is nothing besides wood and minerals that a fortress can do without for any amount of time.  No human player is going to be interested in your 15 tonnes of goblin skinny pants, and I dont want you piece of crap stone mugs either.  (I predict a brisk trade in kitten skull totems though)
Control a full scale fortress and you will get anything you want eventually.  The sheer amount of reasources you have availible is staggering. (crashing the dwarvern economy by dumping all your platinum coins onto the market would be fun though)
Full scale fortress control with trading just isnt an option for this reason, smaller holes in the ground/towers might work.  From there you could decide if you wanted to sell crafts, raid the traders, farm or go mercenary.  Still dwarves, just smaller.