I use Unison to synchronise my servers, and it's fantastic. Until you move 20mb of directories on one server and forget to echo the moves on the other server - then you have pain. Because it doesn't play well with moves, preferring the 'delete and copy again' approach. See, this is why I always write my own utilities because then it does what I want, cries of wheel reinvention be damned.

Ankle still swollen, cables still haven't arrived at Halfords, work still going slowly, and I haven't joined Team America yet.