I like the idea of backing up to a separate server elsewhere.
If there was a catastrophic failure at the primary DC or with the server(s) there, how long would it take to get back online at the secondary DC? Is everything setup and ready to roll as soon as you change IP's ?
What about the server spec's at DC #2? Are you using a lower end server or do you really need to have a dupe of the primary? That would be quite expensive for me but having a lower end one (maybe a single Opteron 270 with SATA RAID 1) could be feasible.
This would be a cool topic for a new thread in the BB section: What type of redundancy / fail-over do you have for your big board.
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