Yes, you should see it. "cat /proc/swaps" should show all your swap devices and you should see /dev/ramzswap0 there, "ls /dev/ramz*" should show the ramzswap device entry, and "cat /proc/ramzswap" the usage stats. If it is not there, try restarting it from xterm as root ("/etc/init.d/ramzswap restart")