We just changed ip's for zebu, jersey, and physics, so your nameserver may not have seen the change yet.
If you can't wait, you may get to zebu.uoregon.edu by doing:
you can get to jersey.uoregon.edu by doing:
and physics.uoregon.edu by doing:
guernsey and pmo-sun will be absorbed here soon... This whole business should be cleared up as the DNS info propagates everywhere. ...maybe within a few hours or days.