I've set up a server for myself as a central point for synchronisation. Most of the time, it's only a backup, but I have different machines that are on and off at different times, so it helps to have somewhere to sync to that's guaranteed always-on. The problem is, hosting companies charge lots for disk space. Backupsy is the best I've found, at $10/mo for 250Gb, a bit less than half the cost of using Dropbox -- but it's still pricey. Does anyone know of anything cheaper? Amazon S3 is about 1c/mo/Gb (plus bandwidth charges etc) so presumably there's room for people to drive the price down.