Redundant Data Center Architectures

[Stefan Fouant <sfouant () novadatacom com>]

I'm wondering what are the growing trends in connecting Data Centers for redundancy in DR/COOP environments.  I imagine 
VPLS has a big play here, but I'm willing to bet there are all sorts of weirdness that such environments can create, 
such as the effect it may have on DR elections, etc.  Also, what are your experiences in replication of storage over 
WAN links?  Are people tending towards iSCSI or do trends indicate that FCoE or FCoIP may become the preferred 
mechanism?  Any experience with WAN acceleration in such environments?

Thanks in advance!

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Stefan Fouant