I am interested. But before I try can you confirm some things:
1. Do all the SPF+ ports work? If I plug in SFP Copper RJ-45 transceivers into eth0, eth1, eth3 cages can I get these to work?
2. Would it be possible to then run Xen. I normally install Xen following https://wiki.debian.org/Xen but I assume I would have to compile a custom Xen kernel.