Yes, I was actually thinking that ginger beer (or ale) could be nice with the syrup for a non-alcoholic drink. You might have to play around with the vodka, since it lacks flavor (especially compared to whiskey) but totally worth a try!
I think the syrup would be good in any application. You could reduce it even further for a more concentrated syrup and drizzle over vanilla ice cream. You could use it as a soda syrup and mix with sparkling water. All sorts of possibilities!