I wanted to add a custom marker to my demo: http://drewwells.net/craigmaps/
Instead, I had to make a red dot to specify the place I wanted. Adding an image seems to want to layer that, but all I want is to stick the center of an icon to a lon/lat I specify.
On the same topic, is there any other way to put a point on the map than setting up a geoJSON with geometry set to point. This seemed counterintuitive, but was the only way I could figure it out with just the docs and demo to go buy.