I have not used HP's blade solution, but I had a similar problem I needed to solve using an IBM S chassis with several DMZ blades on a non-virtualized setup.
Normally, you'd setup VLANs with tagging/trunking and (likely) LACP to provide redundancy between your uplinks between your chassis switch module and your real switches on your network, but I felt that with the few blades I had (3), and the simplistic network I was setting up, I skipped the VLAN trunking and instead treated the blade/switch module port pairings as host/server interfaces (see below) and plugged them into an untagged native VLAN -- either the "trusted" or "DMZ" VLAN, along with the appropriate firewall interface -- on the one managed switch I had for the project.
I found through packet-sniffing on the Advanced Management Module interface (the main chassis "command and control" unit) I could see a lot of (proxied) ARP chatter from the internal chassis network (from the various I/O modules), but from within the operating systems/network stack (Linux) installed on the bare metal on the blade itself, I couldn't "see" any of the non-DMZ hosts from the DMZ ones because I had assigned each physical interface on the blade switch module to an isolated group that in turn was assigned to a blade, effectively setting up a 1:1 ratio of switch module ports to logical interfaces on the blade, i.e. on the switch module, port 1 is assigned to group 1, which is assigned to blade 1; port 2 is assigned group 2, which is assigned to blade 2, and so on.
As for the shared storage, I did something similar again with a combination of zoning (the mapping of I/O ports between blades and storage; this determines which harddrive(s) the blade(s) have access), RAID pools, and volumes (the block-level device you partition/format/mount in your OS).
Once you get your head around the fact that the blade chassis is just a tidier/more efficient hardware I/O architecture, what you're doing logically within the storage or network configuration is essentially the same as the physical equivalent.