FYI, a little searching and I answer the question. HAHA!
Apparently VDP v5.8 brings support for EXT4:
http://blogs.vmware.com/vsphere/2014/08/whats-new-vdp-58-vr-58.html
"
It is now possible to deploy external proxies with VDP Advanced enabling more efficient backups in remote locations where the VDP Advanced appliance does not have direct access to the storage on which protected VMs are running, e.g., a separate cluster or remote site. An external proxy also supports VMs with Linux Logical Volume Manager (LVM) and EXT4 file systems.
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