Using S4cmd on my Debian box I backup copies of my entire Lightroom folder structure contents. All my personal photos and videos get uploaded to a bucket on S3, then I convert the entire bucket to Glacier. Now with the new pricing of $0.004/GB and easy retrieval, it's a very nice setup.

To backup nearly a terabyte of photos costs about $4/month in storage costs. Uploading costs a bit extra due to the pricing for requests.

https://github.com/bloomreach/s4cmd