I love this concept, but my last version of Justin's command didn't have image dimensions.  Now it inserts dimensions if you're inside a blank rule or creates a full rule with dimensions in source.css.  Of course, if you're inside parenthesis it will just insert the name with single quotes, inside single quotes just the name, you know how it goes.  It inserts as a snippet and on the longer snippets it kindly leaves you after the last semicolon of the last value, so that if you're using the workflow commands adding more declarations is as easy as hitting tab or CTRL-N then TAB for a new rule.  

I'm actually finding this more useful than the drag command... it's more accessible and doesn't require the mouse!  But they both have their place, the drag is nice when you have a lot more images and the folder management comes into play.  A big thanks to Justin Palmer.