I tried to give Gnomes some respectibility in my Spelljammer game. I made them inventors, not the stupid Dragonlance version but real inventors. Dwarves invented the cannon, Gnomes invented handguns and rifles. The elves invented Spelljamming technology, gnome invented improvements for them, rudders for manuvering, sails for speed, armor and what not.
They also became merchants and sold to both sides durning the Dwarven Empire Expansion. Sort of like the Bothan Spynet if you know your Expanded Universe Star Wars worked for both sides durning that war.
The players didn't laugh when they met a Gnome Merchant and looked for them when they need reapirs. So I think I helped.