Sure.
Mozy is $4.95/month for unlimited storage for one computer. This is their "home user" product and, as you might expect, pricing is higher for business use. Desktop licenses are $3.95 + $0.50/GB per month, server licenses are $6.95 + $1.75/GB per month. I'm purely non-commercial so I haven't really looked at the licensing terms to determine whether or not a business could use the home version for a single machine or not, but I suspect the restriction's in there somewhere.
Setting up Mozy was a breeze. It'll try to figure out what you want it to back up, but I just told it to do my photo storage drive. Tell it how often and at what time you want it to back up, and it just runs in the background.
Amazon's S3 is priced based on what you use. It factors in storage space used, bandwidth used, and number of requests for the files you've got on their servers, which makes it surprisingly economical. Transferring my current 20GB of photos to their servers and allowing for another 5G or so of yet-to-be-shot photos brings my monthly bill to $6.25. Since I'm using it for backup, next month's bill will be lower since I don't have to transfer all 25G of my photos again, just the new stuff. They've got a nifty
pricing calculator available to help ball-park your cost.
Here's their pricing structure, blatantly copied from one of their pages:
Storage
$0.15 per GB-Month of storage used
Data Transfer
$0.100 per GB - all data transfer in
$0.170 per GB - first 10 TB / month data transfer out
$0.130 per GB - next 40 TB / month data transfer out
$0.110 per GB - next 100 TB / month data transfer out
$0.100 per GB - data transfer out / month over 150 TB
Requests
$0.01 per 1,000 PUT, POST, or LIST requests
$0.01 per 10,000 GET and all other requests*
* No charge for delete requests
The S3/JungleDisk setup is slightly more complex. You've first got to sign up for an S3 account, which you can do directly from JungleDisk's web site. Then you just need to install their software (Windows, Linux, and Mac supported) and provide your "Access Identifiers". which Amazon will provide. Once that's done, you'll need to reboot and then you can access your JungleDisk just like a local hard disk. It'll default to J:.