Yep, all three caterpillars are thriving.  You can see pictures of them here.

http://monarchwatch.smugmug.com/Monarchs-in-Space/Monarchs-on-the-Space-Station/10305636_wwEsm#717590325_TFsWE

They look very healthy despite having been in the dark for about 2 days (from launch of Atlantis until the shuttle docked with the ISS)