The group at CMU that sent the truck coast to coast (more or less) was the NAVLAB. Their web site is at
http://www.ri.cmu.edu/labs/lab_28.html
If you are really interested in what CMU is doing with robots start at
http://www.ri.cmu.edu/ and plan on spending a day or two looking through the links. If there is a university doing more with robotics than CMU I can not imagine where it is.
Also check out a news release about DARPA funding for a mobile combat robot that CMU is building. That link is
http://www.cmu.edu/cmnews/extra/020725_ugcv.html