It's actually much less dramatic, and less worrisome than physically moving. We have a new server placed in a new data center, and we plan to move this site (data) to it early next week. Most likely Tuesday evening (3/26/1013). There will be an hour or two of downtime, baring any unexpected surprises.
I'll update this topic as we get closer and have a time frame scheduled. I'll also update when the move is completed, and you can report any issues here.
Why the move? New server(s)! Lots of redundancy... RAID, warm spare (database), cold spare (hardware), redundant power, hot swap components, etc. Modernize... newer generation low power CPUs, SSDs, gobs of RAM, lots of drives, more room for virtualization/development... Closer to server staff.