Found some nice rum called 20 Boat out of Trury Vineyards in Cape Cod.
Twenty Boat Spiced Rum. This small batch, twice distilled spiced rum is made from organic molasses and an exclusive blend of spices sourced locally from North Truro's very own Atlantic Spice Company. Heavy in notes of cardamom, vanilla bean and cinnamon, we know you will find our new offering to be a special and palatable addition to your year round cocktail repertoire. NOTE: Only available for shipping in Massachusetts.
Next time I'm out there I'm stocking up.
The 'ol standbyes would have to be Sailor Jerry's, Kraken, Bacardi Gold or Select, Capt Morgan's, and of course Captain Morgan's Lime Bite, which isn't available everywhere. Cruzan and Malibu is usually on-hand but not in Dark and Stormys.
I make Dark 'n Stormys in moderation with various ginger beers and rums-whatever is there. I don't know if ginger beer has become more popular because it seems to be no trouble finding six or more brands locally here in "the city" these days. Used to be a hunt high and low for it. There is even a Kroger (big grocery chain) brand now. I like Bundaberg brand the best and it's at Costco of all places. They are definitely love them or hate them drinks. My wife and a couple of friends can't stand 'em.
Something I haven't seen mentioned here is bitters. Add about 4-6 drops of Angostura Bitters, drops of lime juice (if not using a lime), ice, rum and ginger beer.