We were able to move the Service Console to the other vSwitch using the following commands:
esxcfg-vswif -d vswif0
esxcfg-vswitch -D "Service Console" vSwitch0
esxcfg-vswif -A "Service Console" vSwitch1
esxcfg-vswif -a vswif0 -p "Service Console" -i 192.168.3.53 -n 255.255.255.0
Once we had restored access to the Service Console, we could move the VM's to the other vSwitch using the viclient.
Thanks to the following websites for guidence:
http://www.petri.co.il/forums/showthread.php?t=32229
http://vmware-land.com/esxcfg-help.html
