I know by default that Twenty Twelve does not have in-post sidebars. Twenty Eleven didn't either but at least it had an extension plugin to add those.
Does Twenty Twelve have anything similar? Should I even bother trying seeing as Twenty Thirteen should be out in a little bit and hope that in-post sidebars will be an option?
I like the minimalist look that Twenty Twelve does, I just don't like the lack of side-bar options.