Do you see humans as the seafaring race? Will waterways and trade by ship play a central role to civilizations? Which races will participate in sailing and building ships? How large, in units of men and/or dwarfcube dimensions*, will the larger boats be in the future?
Personally, I see all races as having some manner of sea/river travel ability possible in the future. First question: Yes. Second question: Chances are good,
possibly hopefully randomly determined for each world. Third question: Already answered/will be answered.
(All measurements in length by width by height and in dwarfcubes)
Humans: Yes: fishing boats (smaller, maybe 5-7x3-5x2-3 dwarfcubes in size), galleys along the line of ancient greeks/romans/egyptians (i.e. ramming, boarding, ballistas, catapults).
Elves: Yes: Canoes or hollowed logs, perhaps some manner of specially cultivated tree (2-20x1-3x1-2) with the larger measurements being for the massive trees. Alternatively, give them boats similar to the humans made entirely out of sentient corpses.
Kobolds: Yes: More by accident than anything else, but they can travel by fallen tree express (1-3x1x1).
Goblins: Yes: They are intelligent enough for the smelting of metals, so they should have sailing capabilities, probably something along the lines of the viking raider/pirate style that I believe has been mentioned previously.
Forgotten Beasts/Titan: They walk.
Dwarves: Most certainly yes. I support the previously mentioned designs, all of them. Also, just because they are dwarves, I see them sailing in massive vessels composed of anything from wood to stone to bones to
bones/flesh to ice. These massive vessels would possess extensive fortifications and excessive quanitites of
weapons, not to mention the onboard plump helmet farms and the endless supply of booze.
Speaking of booze, does dwarven wine really fit for dwarves? Perhaps it could be named whiskey or something similarly more liver terrifying.