After listening to Reply All #61, I decided it was time to re-look into Genius Web Annotations. I've enabled their javascript on every post. Give it a try.
/Nat
Update: I followed this up with some tweets, because this javascript injects a lot into my site.
Hey @geniusdevs, would it be possible to get a version of your inpage js that doesn't inject so much? pic.twitter.com/pClx6LPogQ
— Nat Welch (@icco) April 15, 2016