Re: How I Met Your Mother: Barney and... (Spoilers ahead...)
As I pointed out to my wife, there could be a degree of comedy in Robin moving into the apartment while Ted is living there. Think about Ted taking back a girl to his apartment, only to learn his ex lives with him.
"When I reach for the edge of the universe, I do it knowing that along some paths of cosmic discovery, there are times when, at least for now, one must be content to love the questions themselves." --Neil deGrasse Tyson