Hey guys I found this tilemill to develop WebGIS application using MapBox. I wanted to know how is it better than OpenLayers and if I have to develop which would be a better options to go for, as I will be developing a complete GIS Architecture.
I tried to explain the relevant details of your interest below. I want to say briefly, if you want to build great application what you're looking for is that OpenLayers.
i hope it helps you...