Xen users - Feb 2012 - pvgrub, ext4 boot partitions and grub2 config files

Hi,
I do use Xen 4.1.2, pygrub does support both ext4 boot partitions and 
grub2 config files. Does it apply to pvgrub too?

Thanks,
Niccolò

Nobody knows if latest pvgrub does support ext4 and grub2?

Niccolò