I've been struggling with my home network all day. I had a 250GB drive in my 
FreeNAS server fail and it's made my whole Easter Sunday very depressing. Lucky for me I had dual drive setup that mirrored all my important data, but I hadn't been good at keeping it all that up to date.
I was a big fan of 
Microsoft SyncToy for backing files to my home network, but it's failed me in the past, and the new Sync 2.0 framework that seems to run constantly system is bothersome, so I ventured out for a new solution.
I've been using Siber System's 
RoboForm for years and I knew they had a sync solution, but I hadn't investigated. Oh, what I've been missing out on is file-syncing sweetness...

This bad boy will sync files between networks, FTP sites and (the kicker for me) my 
Amazon S3 storage account. Now I can have automated local backup to cheap USB drives or my FreeNAS (if I ever get it working again...) *and* I can backup to the Amazon cloud storage for mission critical files I can't afford to lose.
April is a good month to cracking, 
GoodSync is $19.55 until 4/15 (down form 30 bucks with coupon code 
1040G) and 
“data transfer in” to Amazon S3 is only $0.03 per GB (vs. the standard $0.10) for 3 months, April through June.
Enjoy!