In answer to blade's first github issue: can blade be used with mapbox and markercluster? Sure, the mrhyde library underenath should work with almost any js library. Here's my port of the example code.
Modified http://api.tiles.mapbox.com/mapbox.js/v1.3.1/mapbox.js to a secure url
Modified http://www.mapbox.com/mapbox.js/assets/leaflet.markercluster.js to a secure url
Modified http://www.mapbox.com/mapbox.js/assets/realworld.388.js to a secure url
https://api.tiles.mapbox.com/mapbox.js/v1.3.1/mapbox.js
https://www.mapbox.com/mapbox.js/assets/leaflet.markercluster.js
https://www.mapbox.com/mapbox.js/assets/realworld.388.js