Richardson may or may not want a gig in an upcoming administration. He could, with a serious return to Democratic rulership (ie White House & a bigger margin in Congress) he might want to remain an influential Western governor. And then run again later.
I think he would be great in a bigger role though. No one is talking about elevating our diplomatic ties to Latin America at this point, but they should be. And Richardson does seem to have an interest in working in that direction.
He was the most intriguing of all the candidates, I thought. Even came straight out and declared himself a social justice Catholic--you don't see that every day in the US of A among presidential candidates!