Found a cheap-ish plug solution to allow you to run power to your #twatch or similar device instead of being tethered to running near a power outlet.
http://cgi.ebay.com.au/Passive-Power-ov ... 3efc5c8c64 (http://cgi.ebay.com.au/Passive-Power-over-Ethernet-POE-injector-extractor-kit_W0QQitemZ270521896036QQcmdZViewItemQQptZLH_DefaultDomain_3?hash=item3efc5c8c64)
(hoping link to ebay works - if not search for item 270521896036)
Even some hand-crafted ones for a simple DC power bus would allow you to run a single plug pack (with enough amperage of course) at the "wiring closet" and run multiple devices on the end of the ethernet cables.