is anyone using lacinia with something other than pedestal? if so do you know of any open source projects that would be useful ?

We use it with Ring (on top of immutant). I'm not sure of any particular open-source things that are useful, but it's pretty straightforward to use

I use it on top of plain Ring for my open source chat bot, Yetibot. https://github.com/yetibot/yetibot.core/blob/master/src/yetibot/core/webapp/routes/graphql.clj It powers the web dashboard at https://public.yetibot.com