I remember lvm2 working in the past, as I was using a swap drive from lvm2.
I am not sure when it stopped working, but I tried it now with MC 3.0, 3.1, and with 3.2rc1.
pvscan works.
pvdisplay works.
vgscan works.
vgdisplay works.
lvscan works and shows both logical volumes inactive.
vgchange -ay hangs, and
lvscan shows /dev/VolGroup00/Logvol00 ACTIVE and /dev/VolGroup00/Logvol01 inactive.
There is no /dev/VolGroup00 directory.