Has there been any proper work done for a human mission to Mars yet?

i.e. a rough design on the type of spacecraft that will be used, or
some small amount of metal being bent, or at the very least a rough
selection of who will be in the crew, or at least ANYTHING specfic
that will give some indication that NASA is serious about going to
Mars.


Christopher
+++++++++++++++++++++++++
"There's a light at the end
of the tunnel" says the optimist.
"It's probably a train coming
stright at us" responds the pessimist.